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+/*
+ *
+ * Copyright (c) 1994
+ * Hewlett-Packard Company
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation. Hewlett-Packard Company makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ *
+ * Copyright (c) 1996
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation. Silicon Graphics makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ */
+
+/* NOTE: This is an internal header file, included by other STL headers.
+ * You should not attempt to use it directly.
+ */
+
+#ifndef __SGI_STL_INTERNAL_ALGO_H
+#define __SGI_STL_INTERNAL_ALGO_H
+
+#include <stl_heap.h>
+
+__STL_BEGIN_NAMESPACE
+
+#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
+#pragma set woff 1209
+#endif
+
+template <class T>
+inline const T& __median(const T& a, const T& b, const T& c) {
+ if (a < b)
+ if (b < c)
+ return b;
+ else if (a < c)
+ return c;
+ else
+ return a;
+ else if (a < c)
+ return a;
+ else if (b < c)
+ return c;
+ else
+ return b;
+}
+
+template <class T, class Compare>
+inline const T& __median(const T& a, const T& b, const T& c, Compare comp) {
+ if (comp(a, b))
+ if (comp(b, c))
+ return b;
+ else if (comp(a, c))
+ return c;
+ else
+ return a;
+ else if (comp(a, c))
+ return a;
+ else if (comp(b, c))
+ return c;
+ else
+ return b;
+}
+
+template <class InputIterator, class Function>
+Function for_each(InputIterator first, InputIterator last, Function f) {
+ for ( ; first != last; ++first)
+ f(*first);
+ return f;
+}
+
+template <class InputIterator, class T>
+InputIterator find(InputIterator first, InputIterator last, const T& value) {
+ while (first != last && *first != value) ++first;
+ return first;
+}
+
+template <class InputIterator, class Predicate>
+InputIterator find_if(InputIterator first, InputIterator last,
+ Predicate pred) {
+ while (first != last && !pred(*first)) ++first;
+ return first;
+}
+
+template <class ForwardIterator>
+ForwardIterator adjacent_find(ForwardIterator first, ForwardIterator last) {
+ if (first == last) return last;
+ ForwardIterator next = first;
+ while(++next != last) {
+ if (*first == *next) return first;
+ first = next;
+ }
+ return last;
+}
+
+template <class ForwardIterator, class BinaryPredicate>
+ForwardIterator adjacent_find(ForwardIterator first, ForwardIterator last,
+ BinaryPredicate binary_pred) {
+ if (first == last) return last;
+ ForwardIterator next = first;
+ while(++next != last) {
+ if (binary_pred(*first, *next)) return first;
+ first = next;
+ }
+ return last;
+}
+
+template <class InputIterator, class T, class Size>
+void count(InputIterator first, InputIterator last, const T& value,
+ Size& n) {
+ for ( ; first != last; ++first)
+ if (*first == value)
+ ++n;
+}
+
+template <class InputIterator, class Predicate, class Size>
+void count_if(InputIterator first, InputIterator last, Predicate pred,
+ Size& n) {
+ for ( ; first != last; ++first)
+ if (pred(*first))
+ ++n;
+}
+
+#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
+
+template <class InputIterator, class T>
+typename iterator_traits<InputIterator>::difference_type
+count(InputIterator first, InputIterator last, const T& value) {
+ typename iterator_traits<InputIterator>::difference_type n = 0;
+ for ( ; first != last; ++first)
+ if (*first == value)
+ ++n;
+ return n;
+}
+
+template <class InputIterator, class Predicate>
+typename iterator_traits<InputIterator>::difference_type
+count_if(InputIterator first, InputIterator last, Predicate pred) {
+ typename iterator_traits<InputIterator>::difference_type n = 0;
+ for ( ; first != last; ++first)
+ if (pred(*first))
+ ++n;
+ return n;
+}
+
+
+#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
+
+template <class ForwardIterator1, class ForwardIterator2, class Distance1,
+ class Distance2>
+ForwardIterator1 __search(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2,
+ Distance1*, Distance2*) {
+ Distance1 d1 = 0;
+ distance(first1, last1, d1);
+ Distance2 d2 = 0;
+ distance(first2, last2, d2);
+
+ if (d1 < d2) return last1;
+
+ ForwardIterator1 current1 = first1;
+ ForwardIterator2 current2 = first2;
+
+ while (current2 != last2)
+ if (*current1 == *current2) {
+ ++current1;
+ ++current2;
+ }
+ else {
+ if (d1 == d2)
+ return last1;
+ else {
+ current1 = ++first1;
+ current2 = first2;
+ --d1;
+ }
+ }
+ return first1;
+}
+
+template <class ForwardIterator1, class ForwardIterator2>
+inline ForwardIterator1 search(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2)
+{
+ return __search(first1, last1, first2, last2, distance_type(first1),
+ distance_type(first2));
+}
+
+template <class ForwardIterator1, class ForwardIterator2,
+ class BinaryPredicate, class Distance1, class Distance2>
+ForwardIterator1 __search(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2,
+ BinaryPredicate binary_pred, Distance1*, Distance2*) {
+ Distance1 d1 = 0;
+ distance(first1, last1, d1);
+ Distance2 d2 = 0;
+ distance(first2, last2, d2);
+
+ if (d1 < d2) return last1;
+
+ ForwardIterator1 current1 = first1;
+ ForwardIterator2 current2 = first2;
+
+ while (current2 != last2)
+ if (binary_pred(*current1, *current2)) {
+ ++current1;
+ ++current2;
+ }
+ else {
+ if (d1 == d2)
+ return last1;
+ else {
+ current1 = ++first1;
+ current2 = first2;
+ --d1;
+ }
+ }
+ return first1;
+}
+
+template <class ForwardIterator1, class ForwardIterator2,
+ class BinaryPredicate>
+inline ForwardIterator1 search(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2,
+ BinaryPredicate binary_pred) {
+ return __search(first1, last1, first2, last2, binary_pred,
+ distance_type(first1), distance_type(first2));
+}
+
+template <class ForwardIterator, class Integer, class T>
+ForwardIterator search_n(ForwardIterator first, ForwardIterator last,
+ Integer count, const T& value) {
+ if (count <= 0)
+ return first;
+ else {
+ first = find(first, last, value);
+ while (first != last) {
+ Integer n = count - 1;
+ ForwardIterator i = first;
+ ++i;
+ while (i != last && n != 0 && *i == value) {
+ ++i;
+ --n;
+ }
+ if (n == 0)
+ return first;
+ else
+ first = find(i, last, value);
+ }
+ return last;
+ }
+}
+
+template <class ForwardIterator, class Integer, class T, class BinaryPredicate>
+ForwardIterator search_n(ForwardIterator first, ForwardIterator last,
+ Integer count, const T& value,
+ BinaryPredicate binary_pred) {
+ if (count <= 0)
+ return first;
+ else {
+ while (first != last) {
+ if (binary_pred(*first, value)) break;
+ ++first;
+ }
+ while (first != last) {
+ Integer n = count - 1;
+ ForwardIterator i = first;
+ ++i;
+ while (i != last && n != 0 && binary_pred(*i, value)) {
+ ++i;
+ --n;
+ }
+ if (n == 0)
+ return first;
+ else {
+ while (i != last) {
+ if (binary_pred(*i, value)) break;
+ ++i;
+ }
+ first = i;
+ }
+ }
+ return last;
+ }
+}
+
+template <class ForwardIterator1, class ForwardIterator2>
+ForwardIterator2 swap_ranges(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2) {
+ for ( ; first1 != last1; ++first1, ++first2)
+ iter_swap(first1, first2);
+ return first2;
+}
+
+template <class InputIterator, class OutputIterator, class UnaryOperation>
+OutputIterator transform(InputIterator first, InputIterator last,
+ OutputIterator result, UnaryOperation op) {
+ for ( ; first != last; ++first, ++result)
+ *result = op(*first);
+ return result;
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator,
+ class BinaryOperation>
+OutputIterator transform(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, OutputIterator result,
+ BinaryOperation binary_op) {
+ for ( ; first1 != last1; ++first1, ++first2, ++result)
+ *result = binary_op(*first1, *first2);
+ return result;
+}
+
+template <class ForwardIterator, class T>
+void replace(ForwardIterator first, ForwardIterator last, const T& old_value,
+ const T& new_value) {
+ for ( ; first != last; ++first)
+ if (*first == old_value) *first = new_value;
+}
+
+template <class ForwardIterator, class Predicate, class T>
+void replace_if(ForwardIterator first, ForwardIterator last, Predicate pred,
+ const T& new_value) {
+ for ( ; first != last; ++first)
+ if (pred(*first)) *first = new_value;
+}
+
+template <class InputIterator, class OutputIterator, class T>
+OutputIterator replace_copy(InputIterator first, InputIterator last,
+ OutputIterator result, const T& old_value,
+ const T& new_value) {
+ for ( ; first != last; ++first, ++result)
+ *result = *first == old_value ? new_value : *first;
+ return result;
+}
+
+template <class Iterator, class OutputIterator, class Predicate, class T>
+OutputIterator replace_copy_if(Iterator first, Iterator last,
+ OutputIterator result, Predicate pred,
+ const T& new_value) {
+ for ( ; first != last; ++first, ++result)
+ *result = pred(*first) ? new_value : *first;
+ return result;
+}
+
+template <class ForwardIterator, class Generator>
+void generate(ForwardIterator first, ForwardIterator last, Generator gen) {
+ for ( ; first != last; ++first)
+ *first = gen();
+}
+
+template <class OutputIterator, class Size, class Generator>
+OutputIterator generate_n(OutputIterator first, Size n, Generator gen) {
+ for ( ; n > 0; --n, ++first)
+ *first = gen();
+ return first;
+}
+
+template <class InputIterator, class OutputIterator, class T>
+OutputIterator remove_copy(InputIterator first, InputIterator last,
+ OutputIterator result, const T& value) {
+ for ( ; first != last; ++first)
+ if (*first != value) {
+ *result = *first;
+ ++result;
+ }
+ return result;
+}
+
+template <class InputIterator, class OutputIterator, class Predicate>
+OutputIterator remove_copy_if(InputIterator first, InputIterator last,
+ OutputIterator result, Predicate pred) {
+ for ( ; first != last; ++first)
+ if (!pred(*first)) {
+ *result = *first;
+ ++result;
+ }
+ return result;
+}
+
+template <class ForwardIterator, class T>
+ForwardIterator remove(ForwardIterator first, ForwardIterator last,
+ const T& value) {
+ first = find(first, last, value);
+ ForwardIterator next = first;
+ return first == last ? first : remove_copy(++next, last, first, value);
+}
+
+template <class ForwardIterator, class Predicate>
+ForwardIterator remove_if(ForwardIterator first, ForwardIterator last,
+ Predicate pred) {
+ first = find_if(first, last, pred);
+ ForwardIterator next = first;
+ return first == last ? first : remove_copy_if(++next, last, first, pred);
+}
+
+template <class InputIterator, class ForwardIterator>
+ForwardIterator __unique_copy(InputIterator first, InputIterator last,
+ ForwardIterator result, forward_iterator_tag) {
+ *result = *first;
+ while (++first != last)
+ if (*result != *first) *++result = *first;
+ return ++result;
+}
+
+
+template <class InputIterator, class OutputIterator, class T>
+OutputIterator __unique_copy(InputIterator first, InputIterator last,
+ OutputIterator result, T*) {
+ T value = *first;
+ *result = value;
+ while (++first != last)
+ if (value != *first) {
+ value = *first;
+ *++result = value;
+ }
+ return ++result;
+}
+
+template <class InputIterator, class OutputIterator>
+inline OutputIterator __unique_copy(InputIterator first, InputIterator last,
+ OutputIterator result,
+ output_iterator_tag) {
+ return __unique_copy(first, last, result, value_type(first));
+}
+
+template <class InputIterator, class OutputIterator>
+inline OutputIterator unique_copy(InputIterator first, InputIterator last,
+ OutputIterator result) {
+ if (first == last) return result;
+ return __unique_copy(first, last, result, iterator_category(result));
+}
+template <class InputIterator, class ForwardIterator, class BinaryPredicate>
+ForwardIterator __unique_copy(InputIterator first, InputIterator last,
+ ForwardIterator result,
+ BinaryPredicate binary_pred,
+ forward_iterator_tag) {
+ *result = *first;
+ while (++first != last)
+ if (!binary_pred(*result, *first)) *++result = *first;
+ return ++result;
+}
+
+template <class InputIterator, class OutputIterator, class BinaryPredicate,
+ class T>
+OutputIterator __unique_copy(InputIterator first, InputIterator last,
+ OutputIterator result,
+ BinaryPredicate binary_pred, T*) {
+ T value = *first;
+ *result = value;
+ while (++first != last)
+ if (!binary_pred(value, *first)) {
+ value = *first;
+ *++result = value;
+ }
+ return ++result;
+}
+
+template <class InputIterator, class OutputIterator, class BinaryPredicate>
+inline OutputIterator __unique_copy(InputIterator first, InputIterator last,
+ OutputIterator result,
+ BinaryPredicate binary_pred,
+ output_iterator_tag) {
+ return __unique_copy(first, last, result, binary_pred, value_type(first));
+}
+
+template <class InputIterator, class OutputIterator, class BinaryPredicate>
+inline OutputIterator unique_copy(InputIterator first, InputIterator last,
+ OutputIterator result,
+ BinaryPredicate binary_pred) {
+ if (first == last) return result;
+ return __unique_copy(first, last, result, binary_pred,
+ iterator_category(result));
+}
+
+template <class ForwardIterator>
+ForwardIterator unique(ForwardIterator first, ForwardIterator last) {
+ first = adjacent_find(first, last);
+ return unique_copy(first, last, first);
+}
+
+template <class ForwardIterator, class BinaryPredicate>
+ForwardIterator unique(ForwardIterator first, ForwardIterator last,
+ BinaryPredicate binary_pred) {
+ first = adjacent_find(first, last, binary_pred);
+ return unique_copy(first, last, first, binary_pred);
+}
+
+template <class BidirectionalIterator>
+void __reverse(BidirectionalIterator first, BidirectionalIterator last,
+ bidirectional_iterator_tag) {
+ while (true)
+ if (first == last || first == --last)
+ return;
+ else
+ iter_swap(first++, last);
+}
+
+template <class RandomAccessIterator>
+void __reverse(RandomAccessIterator first, RandomAccessIterator last,
+ random_access_iterator_tag) {
+ while (first < last) iter_swap(first++, --last);
+}
+
+template <class BidirectionalIterator>
+inline void reverse(BidirectionalIterator first, BidirectionalIterator last) {
+ __reverse(first, last, iterator_category(first));
+}
+
+template <class BidirectionalIterator, class OutputIterator>
+OutputIterator reverse_copy(BidirectionalIterator first,
+ BidirectionalIterator last,
+ OutputIterator result) {
+ while (first != last) {
+ --last;
+ *result = *last;
+ ++result;
+ }
+ return result;
+}
+
+template <class ForwardIterator, class Distance>
+void __rotate(ForwardIterator first, ForwardIterator middle,
+ ForwardIterator last, Distance*, forward_iterator_tag) {
+ for (ForwardIterator i = middle; ;) {
+ iter_swap(first, i);
+ ++first;
+ ++i;
+ if (first == middle) {
+ if (i == last) return;
+ middle = i;
+ }
+ else if (i == last)
+ i = middle;
+ }
+}
+
+template <class BidirectionalIterator, class Distance>
+void __rotate(BidirectionalIterator first, BidirectionalIterator middle,
+ BidirectionalIterator last, Distance*,
+ bidirectional_iterator_tag) {
+ reverse(first, middle);
+ reverse(middle, last);
+ reverse(first, last);
+}
+
+template <class EuclideanRingElement>
+EuclideanRingElement __gcd(EuclideanRingElement m, EuclideanRingElement n)
+{
+ while (n != 0) {
+ EuclideanRingElement t = m % n;
+ m = n;
+ n = t;
+ }
+ return m;
+}
+
+template <class RandomAccessIterator, class Distance, class T>
+void __rotate_cycle(RandomAccessIterator first, RandomAccessIterator last,
+ RandomAccessIterator initial, Distance shift, T*) {
+ T value = *initial;
+ RandomAccessIterator ptr1 = initial;
+ RandomAccessIterator ptr2 = ptr1 + shift;
+ while (ptr2 != initial) {
+ *ptr1 = *ptr2;
+ ptr1 = ptr2;
+ if (last - ptr2 > shift)
+ ptr2 += shift;
+ else
+ ptr2 = first + (shift - (last - ptr2));
+ }
+ *ptr1 = value;
+}
+
+template <class RandomAccessIterator, class Distance>
+void __rotate(RandomAccessIterator first, RandomAccessIterator middle,
+ RandomAccessIterator last, Distance*,
+ random_access_iterator_tag) {
+ Distance n = __gcd(last - first, middle - first);
+ while (n--)
+ __rotate_cycle(first, last, first + n, middle - first,
+ value_type(first));
+}
+
+template <class ForwardIterator>
+inline void rotate(ForwardIterator first, ForwardIterator middle,
+ ForwardIterator last) {
+ if (first == middle || middle == last) return;
+ __rotate(first, middle, last, distance_type(first),
+ iterator_category(first));
+}
+
+template <class ForwardIterator, class OutputIterator>
+OutputIterator rotate_copy(ForwardIterator first, ForwardIterator middle,
+ ForwardIterator last, OutputIterator result) {
+ return copy(first, middle, copy(middle, last, result));
+}
+
+template <class RandomAccessIterator, class Distance>
+void __random_shuffle(RandomAccessIterator first, RandomAccessIterator last,
+ Distance*) {
+ if (first == last) return;
+ for (RandomAccessIterator i = first + 1; i != last; ++i)
+#ifdef __STL_NO_DRAND48
+ iter_swap(i, first + Distance(rand() % ((i - first) + 1)));
+#else
+ iter_swap(i, first + Distance(lrand48() % ((i - first) + 1)));
+#endif
+}
+
+template <class RandomAccessIterator>
+inline void random_shuffle(RandomAccessIterator first,
+ RandomAccessIterator last) {
+ __random_shuffle(first, last, distance_type(first));
+}
+
+template <class RandomAccessIterator, class RandomNumberGenerator>
+void random_shuffle(RandomAccessIterator first, RandomAccessIterator last,
+ RandomNumberGenerator& rand) {
+ if (first == last) return;
+ for (RandomAccessIterator i = first + 1; i != last; ++i)
+ iter_swap(i, first + rand((i - first) + 1));
+}
+
+template <class ForwardIterator, class OutputIterator, class Distance>
+OutputIterator random_sample_n(ForwardIterator first, ForwardIterator last,
+ OutputIterator out, const Distance n)
+{
+ Distance remaining = 0;
+ distance(first, last, remaining);
+ Distance m = min(n, remaining);
+
+ while (m > 0) {
+#ifdef __STL_NO_DRAND48
+ if (rand() % remaining < m) {
+#else
+ if (lrand48() % remaining < m) {
+#endif
+ *out = *first;
+ ++out;
+ --m;
+ }
+
+ --remaining;
+ ++first;
+ }
+ return out;
+}
+
+template <class ForwardIterator, class OutputIterator, class Distance,
+ class RandomNumberGenerator>
+OutputIterator random_sample_n(ForwardIterator first, ForwardIterator last,
+ OutputIterator out, const Distance n,
+ RandomNumberGenerator& rand)
+{
+ Distance remaining = 0;
+ distance(first, last, remaining);
+ Distance m = min(n, remaining);
+
+ while (m > 0) {
+ if (rand(remaining) < m) {
+ *out = *first;
+ ++out;
+ --m;
+ }
+
+ --remaining;
+ ++first;
+ }
+ return out;
+}
+
+template <class InputIterator, class RandomAccessIterator, class Distance>
+RandomAccessIterator __random_sample(InputIterator first, InputIterator last,
+ RandomAccessIterator out,
+ const Distance n)
+{
+ Distance m = 0;
+ Distance t = n;
+ for ( ; first != last && m < n; ++m, ++first)
+ out[m] = *first;
+
+ while (first != last) {
+ ++t;
+#ifdef __STL_NO_DRAND48
+ Distance M = rand() % t;
+#else
+ Distance M = lrand48() % t;
+#endif
+ if (M < n)
+ out[M] = *first;
+ ++first;
+ }
+
+ return out + m;
+}
+
+template <class InputIterator, class RandomAccessIterator,
+ class RandomNumberGenerator, class Distance>
+RandomAccessIterator __random_sample(InputIterator first, InputIterator last,
+ RandomAccessIterator out,
+ RandomNumberGenerator& rand,
+ const Distance n)
+{
+ Distance m = 0;
+ Distance t = n;
+ for ( ; first != last && m < n; ++m, ++first)
+ out[m] = *first;
+
+ while (first != last) {
+ ++t;
+ Distance M = rand(t);
+ if (M < n)
+ out[M] = *first;
+ ++first;
+ }
+
+ return out + m;
+}
+
+template <class InputIterator, class RandomAccessIterator>
+inline RandomAccessIterator
+random_sample(InputIterator first, InputIterator last,
+ RandomAccessIterator out_first, RandomAccessIterator out_last)
+{
+ return __random_sample(first, last, out_first, out_last - out_first);
+}
+
+template <class InputIterator, class RandomAccessIterator,
+ class RandomNumberGenerator>
+inline RandomAccessIterator
+random_sample(InputIterator first, InputIterator last,
+ RandomAccessIterator out_first, RandomAccessIterator out_last,
+ RandomNumberGenerator& rand)
+{
+ return __random_sample(first, last, out_first, rand, out_last - out_first);
+}
+
+
+
+template <class BidirectionalIterator, class Predicate>
+BidirectionalIterator partition(BidirectionalIterator first,
+ BidirectionalIterator last, Predicate pred) {
+ while (true) {
+ while (true)
+ if (first == last)
+ return first;
+ else if (pred(*first))
+ ++first;
+ else
+ break;
+ --last;
+ while (true)
+ if (first == last)
+ return first;
+ else if (!pred(*last))
+ --last;
+ else
+ break;
+ iter_swap(first, last);
+ ++first;
+ }
+}
+
+template <class ForwardIterator, class Predicate, class Distance>
+ForwardIterator __inplace_stable_partition(ForwardIterator first,
+ ForwardIterator last,
+ Predicate pred, Distance len) {
+ if (len == 1) return pred(*first) ? last : first;
+ ForwardIterator middle = first;
+ advance(middle, len / 2);
+ ForwardIterator
+ first_cut = __inplace_stable_partition(first, middle, pred, len / 2);
+ ForwardIterator
+ second_cut = __inplace_stable_partition(middle, last, pred,
+ len - len / 2);
+ rotate(first_cut, middle, second_cut);
+ len = 0;
+ distance(middle, second_cut, len);
+ advance(first_cut, len);
+ return first_cut;
+}
+
+template <class ForwardIterator, class Pointer, class Predicate,
+ class Distance>
+ForwardIterator __stable_partition_adaptive(ForwardIterator first,
+ ForwardIterator last,
+ Predicate pred, Distance len,
+ Pointer buffer,
+ Distance buffer_size) {
+ if (len <= buffer_size) {
+ ForwardIterator result1 = first;
+ Pointer result2 = buffer;
+ for ( ; first != last ; ++first)
+ if (pred(*first)) {
+ *result1 = *first;
+ ++result1;
+ }
+ else {
+ *result2 = *first;
+ ++result2;
+ }
+ copy(buffer, result2, result1);
+ return result1;
+ }
+ else {
+ ForwardIterator middle = first;
+ advance(middle, len / 2);
+ ForwardIterator first_cut =
+ __stable_partition_adaptive(first, middle, pred, len / 2,
+ buffer, buffer_size);
+ ForwardIterator second_cut =
+ __stable_partition_adaptive(middle, last, pred, len - len / 2,
+ buffer, buffer_size);
+
+ rotate(first_cut, middle, second_cut);
+ len = 0;
+ distance(middle, second_cut, len);
+ advance(first_cut, len);
+ return first_cut;
+ }
+}
+
+template <class ForwardIterator, class Predicate, class T, class Distance>
+inline ForwardIterator __stable_partition_aux(ForwardIterator first,
+ ForwardIterator last,
+ Predicate pred, T*, Distance*) {
+ temporary_buffer<ForwardIterator, T> buf(first, last);
+ if (buf.size() > 0)
+ return __stable_partition_adaptive(first, last, pred,
+ Distance(buf.requested_size()),
+ buf.begin(), buf.size());
+ else
+ return __inplace_stable_partition(first, last, pred,
+ Distance(buf.requested_size()));
+}
+
+template <class ForwardIterator, class Predicate>
+inline ForwardIterator stable_partition(ForwardIterator first,
+ ForwardIterator last,
+ Predicate pred) {
+ if (first == last)
+ return first;
+ else
+ return __stable_partition_aux(first, last, pred,
+ value_type(first), distance_type(first));
+}
+
+template <class RandomAccessIterator, class T>
+RandomAccessIterator __unguarded_partition(RandomAccessIterator first,
+ RandomAccessIterator last,
+ T pivot) {
+ while (true) {
+ while (*first < pivot) ++first;
+ --last;
+ while (pivot < *last) --last;
+ if (!(first < last)) return first;
+ iter_swap(first, last);
+ ++first;
+ }
+}
+
+template <class RandomAccessIterator, class T, class Compare>
+RandomAccessIterator __unguarded_partition(RandomAccessIterator first,
+ RandomAccessIterator last,
+ T pivot, Compare comp) {
+ while (1) {
+ while (comp(*first, pivot)) ++first;
+ --last;
+ while (comp(pivot, *last)) --last;
+ if (!(first < last)) return first;
+ iter_swap(first, last);
+ ++first;
+ }
+}
+
+const int __stl_threshold = 16;
+
+
+template <class RandomAccessIterator, class T>
+void __unguarded_linear_insert(RandomAccessIterator last, T value) {
+ RandomAccessIterator next = last;
+ --next;
+ while (value < *next) {
+ *last = *next;
+ last = next;
+ --next;
+ }
+ *last = value;
+}
+
+template <class RandomAccessIterator, class T, class Compare>
+void __unguarded_linear_insert(RandomAccessIterator last, T value,
+ Compare comp) {
+ RandomAccessIterator next = last;
+ --next;
+ while (comp(value , *next)) {
+ *last = *next;
+ last = next;
+ --next;
+ }
+ *last = value;
+}
+
+template <class RandomAccessIterator, class T>
+inline void __linear_insert(RandomAccessIterator first,
+ RandomAccessIterator last, T*) {
+ T value = *last;
+ if (value < *first) {
+ copy_backward(first, last, last + 1);
+ *first = value;
+ }
+ else
+ __unguarded_linear_insert(last, value);
+}
+
+template <class RandomAccessIterator, class T, class Compare>
+inline void __linear_insert(RandomAccessIterator first,
+ RandomAccessIterator last, T*, Compare comp) {
+ T value = *last;
+ if (comp(value, *first)) {
+ copy_backward(first, last, last + 1);
+ *first = value;
+ }
+ else
+ __unguarded_linear_insert(last, value, comp);
+}
+
+template <class RandomAccessIterator>
+void __insertion_sort(RandomAccessIterator first, RandomAccessIterator last) {
+ if (first == last) return;
+ for (RandomAccessIterator i = first + 1; i != last; ++i)
+ __linear_insert(first, i, value_type(first));
+}
+
+template <class RandomAccessIterator, class Compare>
+void __insertion_sort(RandomAccessIterator first,
+ RandomAccessIterator last, Compare comp) {
+ if (first == last) return;
+ for (RandomAccessIterator i = first + 1; i != last; ++i)
+ __linear_insert(first, i, value_type(first), comp);
+}
+
+template <class RandomAccessIterator, class T>
+void __unguarded_insertion_sort_aux(RandomAccessIterator first,
+ RandomAccessIterator last, T*) {
+ for (RandomAccessIterator i = first; i != last; ++i)
+ __unguarded_linear_insert(i, T(*i));
+}
+
+template <class RandomAccessIterator>
+inline void __unguarded_insertion_sort(RandomAccessIterator first,
+ RandomAccessIterator last) {
+ __unguarded_insertion_sort_aux(first, last, value_type(first));
+}
+
+template <class RandomAccessIterator, class T, class Compare>
+void __unguarded_insertion_sort_aux(RandomAccessIterator first,
+ RandomAccessIterator last,
+ T*, Compare comp) {
+ for (RandomAccessIterator i = first; i != last; ++i)
+ __unguarded_linear_insert(i, T(*i), comp);
+}
+
+template <class RandomAccessIterator, class Compare>
+inline void __unguarded_insertion_sort(RandomAccessIterator first,
+ RandomAccessIterator last,
+ Compare comp) {
+ __unguarded_insertion_sort_aux(first, last, value_type(first), comp);
+}
+
+template <class RandomAccessIterator>
+void __final_insertion_sort(RandomAccessIterator first,
+ RandomAccessIterator last) {
+ if (last - first > __stl_threshold) {
+ __insertion_sort(first, first + __stl_threshold);
+ __unguarded_insertion_sort(first + __stl_threshold, last);
+ }
+ else
+ __insertion_sort(first, last);
+}
+
+template <class RandomAccessIterator, class Compare>
+void __final_insertion_sort(RandomAccessIterator first,
+ RandomAccessIterator last, Compare comp) {
+ if (last - first > __stl_threshold) {
+ __insertion_sort(first, first + __stl_threshold, comp);
+ __unguarded_insertion_sort(first + __stl_threshold, last, comp);
+ }
+ else
+ __insertion_sort(first, last, comp);
+}
+
+template <class Size>
+inline Size __lg(Size n) {
+ Size k;
+ for (k = 0; n != 1; n >>= 1) ++k;
+ return k;
+}
+
+template <class RandomAccessIterator, class T, class Size>
+void __introsort_loop(RandomAccessIterator first,
+ RandomAccessIterator last, T*,
+ Size depth_limit) {
+ while (last - first > __stl_threshold) {
+ if (depth_limit == 0) {
+ partial_sort(first, last, last);
+ return;
+ }
+ --depth_limit;
+ RandomAccessIterator cut = __unguarded_partition
+ (first, last, T(__median(*first, *(first + (last - first)/2),
+ *(last - 1))));
+ __introsort_loop(cut, last, value_type(first), depth_limit);
+ last = cut;
+ }
+}
+
+template <class RandomAccessIterator, class T, class Size, class Compare>
+void __introsort_loop(RandomAccessIterator first,
+ RandomAccessIterator last, T*,
+ Size depth_limit, Compare comp) {
+ while (last - first > __stl_threshold) {
+ if (depth_limit == 0) {
+ partial_sort(first, last, last, comp);
+ return;
+ }
+ --depth_limit;
+ RandomAccessIterator cut = __unguarded_partition
+ (first, last, T(__median(*first, *(first + (last - first)/2),
+ *(last - 1), comp)), comp);
+ __introsort_loop(cut, last, value_type(first), depth_limit, comp);
+ last = cut;
+ }
+}
+
+template <class RandomAccessIterator>
+inline void sort(RandomAccessIterator first, RandomAccessIterator last) {
+ if (first != last) {
+ __introsort_loop(first, last, value_type(first), __lg(last - first) * 2);
+ __final_insertion_sort(first, last);
+ }
+}
+
+template <class RandomAccessIterator, class Compare>
+inline void sort(RandomAccessIterator first, RandomAccessIterator last,
+ Compare comp) {
+ if (first != last) {
+ __introsort_loop(first, last, value_type(first), __lg(last - first) * 2,
+ comp);
+ __final_insertion_sort(first, last, comp);
+ }
+}
+
+
+template <class RandomAccessIterator>
+void __inplace_stable_sort(RandomAccessIterator first,
+ RandomAccessIterator last) {
+ if (last - first < 15) {
+ __insertion_sort(first, last);
+ return;
+ }
+ RandomAccessIterator middle = first + (last - first) / 2;
+ __inplace_stable_sort(first, middle);
+ __inplace_stable_sort(middle, last);
+ __merge_without_buffer(first, middle, last, middle - first, last - middle);
+}
+
+template <class RandomAccessIterator, class Compare>
+void __inplace_stable_sort(RandomAccessIterator first,
+ RandomAccessIterator last, Compare comp) {
+ if (last - first < 15) {
+ __insertion_sort(first, last, comp);
+ return;
+ }
+ RandomAccessIterator middle = first + (last - first) / 2;
+ __inplace_stable_sort(first, middle, comp);
+ __inplace_stable_sort(middle, last, comp);
+ __merge_without_buffer(first, middle, last, middle - first,
+ last - middle, comp);
+}
+
+template <class RandomAccessIterator1, class RandomAccessIterator2,
+ class Distance>
+void __merge_sort_loop(RandomAccessIterator1 first,
+ RandomAccessIterator1 last,
+ RandomAccessIterator2 result, Distance step_size) {
+ Distance two_step = 2 * step_size;
+
+ while (last - first >= two_step) {
+ result = merge(first, first + step_size,
+ first + step_size, first + two_step, result);
+ first += two_step;
+ }
+
+ step_size = min(Distance(last - first), step_size);
+ merge(first, first + step_size, first + step_size, last, result);
+}
+
+template <class RandomAccessIterator1, class RandomAccessIterator2,
+ class Distance, class Compare>
+void __merge_sort_loop(RandomAccessIterator1 first,
+ RandomAccessIterator1 last,
+ RandomAccessIterator2 result, Distance step_size,
+ Compare comp) {
+ Distance two_step = 2 * step_size;
+
+ while (last - first >= two_step) {
+ result = merge(first, first + step_size,
+ first + step_size, first + two_step, result, comp);
+ first += two_step;
+ }
+ step_size = min(Distance(last - first), step_size);
+
+ merge(first, first + step_size, first + step_size, last, result, comp);
+}
+
+const int __stl_chunk_size = 7;
+
+template <class RandomAccessIterator, class Distance>
+void __chunk_insertion_sort(RandomAccessIterator first,
+ RandomAccessIterator last, Distance chunk_size) {
+ while (last - first >= chunk_size) {
+ __insertion_sort(first, first + chunk_size);
+ first += chunk_size;
+ }
+ __insertion_sort(first, last);
+}
+
+template <class RandomAccessIterator, class Distance, class Compare>
+void __chunk_insertion_sort(RandomAccessIterator first,
+ RandomAccessIterator last,
+ Distance chunk_size, Compare comp) {
+ while (last - first >= chunk_size) {
+ __insertion_sort(first, first + chunk_size, comp);
+ first += chunk_size;
+ }
+ __insertion_sort(first, last, comp);
+}
+
+template <class RandomAccessIterator, class Pointer, class Distance>
+void __merge_sort_with_buffer(RandomAccessIterator first,
+ RandomAccessIterator last,
+ Pointer buffer, Distance*) {
+ Distance len = last - first;
+ Pointer buffer_last = buffer + len;
+
+ Distance step_size = __stl_chunk_size;
+ __chunk_insertion_sort(first, last, step_size);
+
+ while (step_size < len) {
+ __merge_sort_loop(first, last, buffer, step_size);
+ step_size *= 2;
+ __merge_sort_loop(buffer, buffer_last, first, step_size);
+ step_size *= 2;
+ }
+}
+
+template <class RandomAccessIterator, class Pointer, class Distance,
+ class Compare>
+void __merge_sort_with_buffer(RandomAccessIterator first,
+ RandomAccessIterator last, Pointer buffer,
+ Distance*, Compare comp) {
+ Distance len = last - first;
+ Pointer buffer_last = buffer + len;
+
+ Distance step_size = __stl_chunk_size;
+ __chunk_insertion_sort(first, last, step_size, comp);
+
+ while (step_size < len) {
+ __merge_sort_loop(first, last, buffer, step_size, comp);
+ step_size *= 2;
+ __merge_sort_loop(buffer, buffer_last, first, step_size, comp);
+ step_size *= 2;
+ }
+}
+
+template <class RandomAccessIterator, class Pointer, class Distance>
+void __stable_sort_adaptive(RandomAccessIterator first,
+ RandomAccessIterator last, Pointer buffer,
+ Distance buffer_size) {
+ Distance len = (last - first + 1) / 2;
+ RandomAccessIterator middle = first + len;
+ if (len > buffer_size) {
+ __stable_sort_adaptive(first, middle, buffer, buffer_size);
+ __stable_sort_adaptive(middle, last, buffer, buffer_size);
+ } else {
+ __merge_sort_with_buffer(first, middle, buffer, (Distance*)0);
+ __merge_sort_with_buffer(middle, last, buffer, (Distance*)0);
+ }
+ __merge_adaptive(first, middle, last, Distance(middle - first),
+ Distance(last - middle), buffer, buffer_size);
+}
+
+template <class RandomAccessIterator, class Pointer, class Distance,
+ class Compare>
+void __stable_sort_adaptive(RandomAccessIterator first,
+ RandomAccessIterator last, Pointer buffer,
+ Distance buffer_size, Compare comp) {
+ Distance len = (last - first + 1) / 2;
+ RandomAccessIterator middle = first + len;
+ if (len > buffer_size) {
+ __stable_sort_adaptive(first, middle, buffer, buffer_size,
+ comp);
+ __stable_sort_adaptive(middle, last, buffer, buffer_size,
+ comp);
+ } else {
+ __merge_sort_with_buffer(first, middle, buffer, (Distance*)0, comp);
+ __merge_sort_with_buffer(middle, last, buffer, (Distance*)0, comp);
+ }
+ __merge_adaptive(first, middle, last, Distance(middle - first),
+ Distance(last - middle), buffer, buffer_size,
+ comp);
+}
+
+template <class RandomAccessIterator, class T, class Distance>
+inline void __stable_sort_aux(RandomAccessIterator first,
+ RandomAccessIterator last, T*, Distance*) {
+ temporary_buffer<RandomAccessIterator, T> buf(first, last);
+ if (buf.begin() == 0)
+ __inplace_stable_sort(first, last);
+ else
+ __stable_sort_adaptive(first, last, buf.begin(), Distance(buf.size()));
+}
+
+template <class RandomAccessIterator, class T, class Distance, class Compare>
+inline void __stable_sort_aux(RandomAccessIterator first,
+ RandomAccessIterator last, T*, Distance*,
+ Compare comp) {
+ temporary_buffer<RandomAccessIterator, T> buf(first, last);
+ if (buf.begin() == 0)
+ __inplace_stable_sort(first, last, comp);
+ else
+ __stable_sort_adaptive(first, last, buf.begin(), Distance(buf.size()),
+ comp);
+}
+
+template <class RandomAccessIterator>
+inline void stable_sort(RandomAccessIterator first,
+ RandomAccessIterator last) {
+ __stable_sort_aux(first, last, value_type(first), distance_type(first));
+}
+
+template <class RandomAccessIterator, class Compare>
+inline void stable_sort(RandomAccessIterator first,
+ RandomAccessIterator last, Compare comp) {
+ __stable_sort_aux(first, last, value_type(first), distance_type(first),
+ comp);
+}
+
+template <class RandomAccessIterator, class T>
+void __partial_sort(RandomAccessIterator first, RandomAccessIterator middle,
+ RandomAccessIterator last, T*) {
+ make_heap(first, middle);
+ for (RandomAccessIterator i = middle; i < last; ++i)
+ if (*i < *first)
+ __pop_heap(first, middle, i, T(*i), distance_type(first));
+ sort_heap(first, middle);
+}
+
+template <class RandomAccessIterator>
+inline void partial_sort(RandomAccessIterator first,
+ RandomAccessIterator middle,
+ RandomAccessIterator last) {
+ __partial_sort(first, middle, last, value_type(first));
+}
+
+template <class RandomAccessIterator, class T, class Compare>
+void __partial_sort(RandomAccessIterator first, RandomAccessIterator middle,
+ RandomAccessIterator last, T*, Compare comp) {
+ make_heap(first, middle, comp);
+ for (RandomAccessIterator i = middle; i < last; ++i)
+ if (comp(*i, *first))
+ __pop_heap(first, middle, i, T(*i), comp, distance_type(first));
+ sort_heap(first, middle, comp);
+}
+
+template <class RandomAccessIterator, class Compare>
+inline void partial_sort(RandomAccessIterator first,
+ RandomAccessIterator middle,
+ RandomAccessIterator last, Compare comp) {
+ __partial_sort(first, middle, last, value_type(first), comp);
+}
+
+template <class InputIterator, class RandomAccessIterator, class Distance,
+ class T>
+RandomAccessIterator __partial_sort_copy(InputIterator first,
+ InputIterator last,
+ RandomAccessIterator result_first,
+ RandomAccessIterator result_last,
+ Distance*, T*) {
+ if (result_first == result_last) return result_last;
+ RandomAccessIterator result_real_last = result_first;
+ while(first != last && result_real_last != result_last) {
+ *result_real_last = *first;
+ ++result_real_last;
+ ++first;
+ }
+ make_heap(result_first, result_real_last);
+ while (first != last) {
+ if (*first < *result_first)
+ __adjust_heap(result_first, Distance(0),
+ Distance(result_real_last - result_first), T(*first));
+ ++first;
+ }
+ sort_heap(result_first, result_real_last);
+ return result_real_last;
+}
+
+template <class InputIterator, class RandomAccessIterator>
+inline RandomAccessIterator
+partial_sort_copy(InputIterator first, InputIterator last,
+ RandomAccessIterator result_first,
+ RandomAccessIterator result_last) {
+ return __partial_sort_copy(first, last, result_first, result_last,
+ distance_type(result_first), value_type(first));
+}
+
+template <class InputIterator, class RandomAccessIterator, class Compare,
+ class Distance, class T>
+RandomAccessIterator __partial_sort_copy(InputIterator first,
+ InputIterator last,
+ RandomAccessIterator result_first,
+ RandomAccessIterator result_last,
+ Compare comp, Distance*, T*) {
+ if (result_first == result_last) return result_last;
+ RandomAccessIterator result_real_last = result_first;
+ while(first != last && result_real_last != result_last) {
+ *result_real_last = *first;
+ ++result_real_last;
+ ++first;
+ }
+ make_heap(result_first, result_real_last, comp);
+ while (first != last) {
+ if (comp(*first, *result_first))
+ __adjust_heap(result_first, Distance(0),
+ Distance(result_real_last - result_first), T(*first),
+ comp);
+ ++first;
+ }
+ sort_heap(result_first, result_real_last, comp);
+ return result_real_last;
+}
+
+template <class InputIterator, class RandomAccessIterator, class Compare>
+inline RandomAccessIterator
+partial_sort_copy(InputIterator first, InputIterator last,
+ RandomAccessIterator result_first,
+ RandomAccessIterator result_last, Compare comp) {
+ return __partial_sort_copy(first, last, result_first, result_last, comp,
+ distance_type(result_first), value_type(first));
+}
+
+template <class RandomAccessIterator, class T>
+void __nth_element(RandomAccessIterator first, RandomAccessIterator nth,
+ RandomAccessIterator last, T*) {
+ while (last - first > 3) {
+ RandomAccessIterator cut = __unguarded_partition
+ (first, last, T(__median(*first, *(first + (last - first)/2),
+ *(last - 1))));
+ if (cut <= nth)
+ first = cut;
+ else
+ last = cut;
+ }
+ __insertion_sort(first, last);
+}
+
+template <class RandomAccessIterator>
+inline void nth_element(RandomAccessIterator first, RandomAccessIterator nth,
+ RandomAccessIterator last) {
+ __nth_element(first, nth, last, value_type(first));
+}
+
+template <class RandomAccessIterator, class T, class Compare>
+void __nth_element(RandomAccessIterator first, RandomAccessIterator nth,
+ RandomAccessIterator last, T*, Compare comp) {
+ while (last - first > 3) {
+ RandomAccessIterator cut = __unguarded_partition
+ (first, last, T(__median(*first, *(first + (last - first)/2),
+ *(last - 1), comp)), comp);
+ if (cut <= nth)
+ first = cut;
+ else
+ last = cut;
+ }
+ __insertion_sort(first, last, comp);
+}
+
+template <class RandomAccessIterator, class Compare>
+inline void nth_element(RandomAccessIterator first, RandomAccessIterator nth,
+ RandomAccessIterator last, Compare comp) {
+ __nth_element(first, nth, last, value_type(first), comp);
+}
+
+template <class ForwardIterator, class T, class Distance>
+ForwardIterator __lower_bound(ForwardIterator first, ForwardIterator last,
+ const T& value, Distance*,
+ forward_iterator_tag) {
+ Distance len = 0;
+ distance(first, last, len);
+ Distance half;
+ ForwardIterator middle;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first;
+ advance(middle, half);
+ if (*middle < value) {
+ first = middle;
+ ++first;
+ len = len - half - 1;
+ }
+ else
+ len = half;
+ }
+ return first;
+}
+
+template <class RandomAccessIterator, class T, class Distance>
+RandomAccessIterator __lower_bound(RandomAccessIterator first,
+ RandomAccessIterator last, const T& value,
+ Distance*, random_access_iterator_tag) {
+ Distance len = last - first;
+ Distance half;
+ RandomAccessIterator middle;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first + half;
+ if (*middle < value) {
+ first = middle + 1;
+ len = len - half - 1;
+ }
+ else
+ len = half;
+ }
+ return first;
+}
+
+template <class ForwardIterator, class T>
+inline ForwardIterator lower_bound(ForwardIterator first, ForwardIterator last,
+ const T& value) {
+ return __lower_bound(first, last, value, distance_type(first),
+ iterator_category(first));
+}
+
+template <class ForwardIterator, class T, class Compare, class Distance>
+ForwardIterator __lower_bound(ForwardIterator first, ForwardIterator last,
+ const T& value, Compare comp, Distance*,
+ forward_iterator_tag) {
+ Distance len = 0;
+ distance(first, last, len);
+ Distance half;
+ ForwardIterator middle;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first;
+ advance(middle, half);
+ if (comp(*middle, value)) {
+ first = middle;
+ ++first;
+ len = len - half - 1;
+ }
+ else
+ len = half;
+ }
+ return first;
+}
+
+template <class RandomAccessIterator, class T, class Compare, class Distance>
+RandomAccessIterator __lower_bound(RandomAccessIterator first,
+ RandomAccessIterator last,
+ const T& value, Compare comp, Distance*,
+ random_access_iterator_tag) {
+ Distance len = last - first;
+ Distance half;
+ RandomAccessIterator middle;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first + half;
+ if (comp(*middle, value)) {
+ first = middle + 1;
+ len = len - half - 1;
+ }
+ else
+ len = half;
+ }
+ return first;
+}
+
+template <class ForwardIterator, class T, class Compare>
+inline ForwardIterator lower_bound(ForwardIterator first, ForwardIterator last,
+ const T& value, Compare comp) {
+ return __lower_bound(first, last, value, comp, distance_type(first),
+ iterator_category(first));
+}
+
+template <class ForwardIterator, class T, class Distance>
+ForwardIterator __upper_bound(ForwardIterator first, ForwardIterator last,
+ const T& value, Distance*,
+ forward_iterator_tag) {
+ Distance len = 0;
+ distance(first, last, len);
+ Distance half;
+ ForwardIterator middle;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first;
+ advance(middle, half);
+ if (value < *middle)
+ len = half;
+ else {
+ first = middle;
+ ++first;
+ len = len - half - 1;
+ }
+ }
+ return first;
+}
+
+template <class RandomAccessIterator, class T, class Distance>
+RandomAccessIterator __upper_bound(RandomAccessIterator first,
+ RandomAccessIterator last, const T& value,
+ Distance*, random_access_iterator_tag) {
+ Distance len = last - first;
+ Distance half;
+ RandomAccessIterator middle;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first + half;
+ if (value < *middle)
+ len = half;
+ else {
+ first = middle + 1;
+ len = len - half - 1;
+ }
+ }
+ return first;
+}
+
+template <class ForwardIterator, class T>
+inline ForwardIterator upper_bound(ForwardIterator first, ForwardIterator last,
+ const T& value) {
+ return __upper_bound(first, last, value, distance_type(first),
+ iterator_category(first));
+}
+
+template <class ForwardIterator, class T, class Compare, class Distance>
+ForwardIterator __upper_bound(ForwardIterator first, ForwardIterator last,
+ const T& value, Compare comp, Distance*,
+ forward_iterator_tag) {
+ Distance len = 0;
+ distance(first, last, len);
+ Distance half;
+ ForwardIterator middle;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first;
+ advance(middle, half);
+ if (comp(value, *middle))
+ len = half;
+ else {
+ first = middle;
+ ++first;
+ len = len - half - 1;
+ }
+ }
+ return first;
+}
+
+template <class RandomAccessIterator, class T, class Compare, class Distance>
+RandomAccessIterator __upper_bound(RandomAccessIterator first,
+ RandomAccessIterator last,
+ const T& value, Compare comp, Distance*,
+ random_access_iterator_tag) {
+ Distance len = last - first;
+ Distance half;
+ RandomAccessIterator middle;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first + half;
+ if (comp(value, *middle))
+ len = half;
+ else {
+ first = middle + 1;
+ len = len - half - 1;
+ }
+ }
+ return first;
+}
+
+template <class ForwardIterator, class T, class Compare>
+inline ForwardIterator upper_bound(ForwardIterator first, ForwardIterator last,
+ const T& value, Compare comp) {
+ return __upper_bound(first, last, value, comp, distance_type(first),
+ iterator_category(first));
+}
+
+template <class ForwardIterator, class T, class Distance>
+pair<ForwardIterator, ForwardIterator>
+__equal_range(ForwardIterator first, ForwardIterator last, const T& value,
+ Distance*, forward_iterator_tag) {
+ Distance len = 0;
+ distance(first, last, len);
+ Distance half;
+ ForwardIterator middle, left, right;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first;
+ advance(middle, half);
+ if (*middle < value) {
+ first = middle;
+ ++first;
+ len = len - half - 1;
+ }
+ else if (value < *middle)
+ len = half;
+ else {
+ left = lower_bound(first, middle, value);
+ advance(first, len);
+ right = upper_bound(++middle, first, value);
+ return pair<ForwardIterator, ForwardIterator>(left, right);
+ }
+ }
+ return pair<ForwardIterator, ForwardIterator>(first, first);
+}
+
+template <class RandomAccessIterator, class T, class Distance>
+pair<RandomAccessIterator, RandomAccessIterator>
+__equal_range(RandomAccessIterator first, RandomAccessIterator last,
+ const T& value, Distance*, random_access_iterator_tag) {
+ Distance len = last - first;
+ Distance half;
+ RandomAccessIterator middle, left, right;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first + half;
+ if (*middle < value) {
+ first = middle + 1;
+ len = len - half - 1;
+ }
+ else if (value < *middle)
+ len = half;
+ else {
+ left = lower_bound(first, middle, value);
+ right = upper_bound(++middle, first + len, value);
+ return pair<RandomAccessIterator, RandomAccessIterator>(left,
+ right);
+ }
+ }
+ return pair<RandomAccessIterator, RandomAccessIterator>(first, first);
+}
+
+template <class ForwardIterator, class T>
+inline pair<ForwardIterator, ForwardIterator>
+equal_range(ForwardIterator first, ForwardIterator last, const T& value) {
+ return __equal_range(first, last, value, distance_type(first),
+ iterator_category(first));
+}
+
+template <class ForwardIterator, class T, class Compare, class Distance>
+pair<ForwardIterator, ForwardIterator>
+__equal_range(ForwardIterator first, ForwardIterator last, const T& value,
+ Compare comp, Distance*, forward_iterator_tag) {
+ Distance len = 0;
+ distance(first, last, len);
+ Distance half;
+ ForwardIterator middle, left, right;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first;
+ advance(middle, half);
+ if (comp(*middle, value)) {
+ first = middle;
+ ++first;
+ len = len - half - 1;
+ }
+ else if (comp(value, *middle))
+ len = half;
+ else {
+ left = lower_bound(first, middle, value, comp);
+ advance(first, len);
+ right = upper_bound(++middle, first, value, comp);
+ return pair<ForwardIterator, ForwardIterator>(left, right);
+ }
+ }
+ return pair<ForwardIterator, ForwardIterator>(first, first);
+}
+
+template <class RandomAccessIterator, class T, class Compare, class Distance>
+pair<RandomAccessIterator, RandomAccessIterator>
+__equal_range(RandomAccessIterator first, RandomAccessIterator last,
+ const T& value, Compare comp, Distance*,
+ random_access_iterator_tag) {
+ Distance len = last - first;
+ Distance half;
+ RandomAccessIterator middle, left, right;
+
+ while (len > 0) {
+ half = len >> 1;
+ middle = first + half;
+ if (comp(*middle, value)) {
+ first = middle + 1;
+ len = len - half - 1;
+ }
+ else if (comp(value, *middle))
+ len = half;
+ else {
+ left = lower_bound(first, middle, value, comp);
+ right = upper_bound(++middle, first + len, value, comp);
+ return pair<RandomAccessIterator, RandomAccessIterator>(left,
+ right);
+ }
+ }
+ return pair<RandomAccessIterator, RandomAccessIterator>(first, first);
+}
+
+template <class ForwardIterator, class T, class Compare>
+inline pair<ForwardIterator, ForwardIterator>
+equal_range(ForwardIterator first, ForwardIterator last, const T& value,
+ Compare comp) {
+ return __equal_range(first, last, value, comp, distance_type(first),
+ iterator_category(first));
+}
+
+template <class ForwardIterator, class T>
+bool binary_search(ForwardIterator first, ForwardIterator last,
+ const T& value) {
+ ForwardIterator i = lower_bound(first, last, value);
+ return i != last && !(value < *i);
+}
+
+template <class ForwardIterator, class T, class Compare>
+bool binary_search(ForwardIterator first, ForwardIterator last, const T& value,
+ Compare comp) {
+ ForwardIterator i = lower_bound(first, last, value, comp);
+ return i != last && !comp(value, *i);
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator>
+OutputIterator merge(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2,
+ OutputIterator result) {
+ while (first1 != last1 && first2 != last2) {
+ if (*first2 < *first1) {
+ *result = *first2;
+ ++first2;
+ }
+ else {
+ *result = *first1;
+ ++first1;
+ }
+ ++result;
+ }
+ return copy(first2, last2, copy(first1, last1, result));
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator,
+ class Compare>
+OutputIterator merge(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2,
+ OutputIterator result, Compare comp) {
+ while (first1 != last1 && first2 != last2) {
+ if (comp(*first2, *first1)) {
+ *result = *first2;
+ ++first2;
+ }
+ else {
+ *result = *first1;
+ ++first1;
+ }
+ ++result;
+ }
+ return copy(first2, last2, copy(first1, last1, result));
+}
+
+template <class BidirectionalIterator, class Distance>
+void __merge_without_buffer(BidirectionalIterator first,
+ BidirectionalIterator middle,
+ BidirectionalIterator last,
+ Distance len1, Distance len2) {
+ if (len1 == 0 || len2 == 0) return;
+ if (len1 + len2 == 2) {
+ if (*middle < *first) iter_swap(first, middle);
+ return;
+ }
+ BidirectionalIterator first_cut = first;
+ BidirectionalIterator second_cut = middle;
+ Distance len11 = 0;
+ Distance len22 = 0;
+ if (len1 > len2) {
+ len11 = len1 / 2;
+ advance(first_cut, len11);
+ second_cut = lower_bound(middle, last, *first_cut);
+ distance(middle, second_cut, len22);
+ }
+ else {
+ len22 = len2 / 2;
+ advance(second_cut, len22);
+ first_cut = upper_bound(first, middle, *second_cut);
+ distance(first, first_cut, len11);
+ }
+ rotate(first_cut, middle, second_cut);
+ BidirectionalIterator new_middle = first_cut;
+ advance(new_middle, len22);
+ __merge_without_buffer(first, first_cut, new_middle, len11, len22);
+ __merge_without_buffer(new_middle, second_cut, last, len1 - len11,
+ len2 - len22);
+}
+
+template <class BidirectionalIterator, class Distance, class Compare>
+void __merge_without_buffer(BidirectionalIterator first,
+ BidirectionalIterator middle,
+ BidirectionalIterator last,
+ Distance len1, Distance len2, Compare comp) {
+ if (len1 == 0 || len2 == 0) return;
+ if (len1 + len2 == 2) {
+ if (comp(*middle, *first)) iter_swap(first, middle);
+ return;
+ }
+ BidirectionalIterator first_cut = first;
+ BidirectionalIterator second_cut = middle;
+ Distance len11 = 0;
+ Distance len22 = 0;
+ if (len1 > len2) {
+ len11 = len1 / 2;
+ advance(first_cut, len11);
+ second_cut = lower_bound(middle, last, *first_cut, comp);
+ distance(middle, second_cut, len22);
+ }
+ else {
+ len22 = len2 / 2;
+ advance(second_cut, len22);
+ first_cut = upper_bound(first, middle, *second_cut, comp);
+ distance(first, first_cut, len11);
+ }
+ rotate(first_cut, middle, second_cut);
+ BidirectionalIterator new_middle = first_cut;
+ advance(new_middle, len22);
+ __merge_without_buffer(first, first_cut, new_middle, len11, len22, comp);
+ __merge_without_buffer(new_middle, second_cut, last, len1 - len11,
+ len2 - len22, comp);
+}
+
+template <class BidirectionalIterator1, class BidirectionalIterator2,
+ class Distance>
+BidirectionalIterator1 __rotate_adaptive(BidirectionalIterator1 first,
+ BidirectionalIterator1 middle,
+ BidirectionalIterator1 last,
+ Distance len1, Distance len2,
+ BidirectionalIterator2 buffer,
+ Distance buffer_size) {
+ BidirectionalIterator2 buffer_end;
+ if (len1 > len2 && len2 <= buffer_size) {
+ buffer_end = copy(middle, last, buffer);
+ copy_backward(first, middle, last);
+ return copy(buffer, buffer_end, first);
+ } else if (len1 <= buffer_size) {
+ buffer_end = copy(first, middle, buffer);
+ copy(middle, last, first);
+ return copy_backward(buffer, buffer_end, last);
+ } else {
+ rotate(first, middle, last);
+ advance(first, len2);
+ return first;
+ }
+}
+
+template <class BidirectionalIterator1, class BidirectionalIterator2,
+ class BidirectionalIterator3>
+BidirectionalIterator3 __merge_backward(BidirectionalIterator1 first1,
+ BidirectionalIterator1 last1,
+ BidirectionalIterator2 first2,
+ BidirectionalIterator2 last2,
+ BidirectionalIterator3 result) {
+ if (first1 == last1) return copy_backward(first2, last2, result);
+ if (first2 == last2) return copy_backward(first1, last1, result);
+ --last1;
+ --last2;
+ while (true) {
+ if (*last2 < *last1) {
+ *--result = *last1;
+ if (first1 == last1) return copy_backward(first2, ++last2, result);
+ --last1;
+ }
+ else {
+ *--result = *last2;
+ if (first2 == last2) return copy_backward(first1, ++last1, result);
+ --last2;
+ }
+ }
+}
+
+template <class BidirectionalIterator1, class BidirectionalIterator2,
+ class BidirectionalIterator3, class Compare>
+BidirectionalIterator3 __merge_backward(BidirectionalIterator1 first1,
+ BidirectionalIterator1 last1,
+ BidirectionalIterator2 first2,
+ BidirectionalIterator2 last2,
+ BidirectionalIterator3 result,
+ Compare comp) {
+ if (first1 == last1) return copy_backward(first2, last2, result);
+ if (first2 == last2) return copy_backward(first1, last1, result);
+ --last1;
+ --last2;
+ while (true) {
+ if (comp(*last2, *last1)) {
+ *--result = *last1;
+ if (first1 == last1) return copy_backward(first2, ++last2, result);
+ --last1;
+ }
+ else {
+ *--result = *last2;
+ if (first2 == last2) return copy_backward(first1, ++last1, result);
+ --last2;
+ }
+ }
+}
+
+template <class BidirectionalIterator, class Distance, class Pointer>
+void __merge_adaptive(BidirectionalIterator first,
+ BidirectionalIterator middle,
+ BidirectionalIterator last, Distance len1, Distance len2,
+ Pointer buffer, Distance buffer_size) {
+ if (len1 <= len2 && len1 <= buffer_size) {
+ Pointer end_buffer = copy(first, middle, buffer);
+ merge(buffer, end_buffer, middle, last, first);
+ }
+ else if (len2 <= buffer_size) {
+ Pointer end_buffer = copy(middle, last, buffer);
+ __merge_backward(first, middle, buffer, end_buffer, last);
+ }
+ else {
+ BidirectionalIterator first_cut = first;
+ BidirectionalIterator second_cut = middle;
+ Distance len11 = 0;
+ Distance len22 = 0;
+ if (len1 > len2) {
+ len11 = len1 / 2;
+ advance(first_cut, len11);
+ second_cut = lower_bound(middle, last, *first_cut);
+ distance(middle, second_cut, len22);
+ }
+ else {
+ len22 = len2 / 2;
+ advance(second_cut, len22);
+ first_cut = upper_bound(first, middle, *second_cut);
+ distance(first, first_cut, len11);
+ }
+ BidirectionalIterator new_middle =
+ __rotate_adaptive(first_cut, middle, second_cut, len1 - len11,
+ len22, buffer, buffer_size);
+ __merge_adaptive(first, first_cut, new_middle, len11, len22, buffer,
+ buffer_size);
+ __merge_adaptive(new_middle, second_cut, last, len1 - len11,
+ len2 - len22, buffer, buffer_size);
+ }
+}
+
+template <class BidirectionalIterator, class Distance, class Pointer,
+ class Compare>
+void __merge_adaptive(BidirectionalIterator first,
+ BidirectionalIterator middle,
+ BidirectionalIterator last, Distance len1, Distance len2,
+ Pointer buffer, Distance buffer_size, Compare comp) {
+ if (len1 <= len2 && len1 <= buffer_size) {
+ Pointer end_buffer = copy(first, middle, buffer);
+ merge(buffer, end_buffer, middle, last, first, comp);
+ }
+ else if (len2 <= buffer_size) {
+ Pointer end_buffer = copy(middle, last, buffer);
+ __merge_backward(first, middle, buffer, end_buffer, last, comp);
+ }
+ else {
+ BidirectionalIterator first_cut = first;
+ BidirectionalIterator second_cut = middle;
+ Distance len11 = 0;
+ Distance len22 = 0;
+ if (len1 > len2) {
+ len11 = len1 / 2;
+ advance(first_cut, len11);
+ second_cut = lower_bound(middle, last, *first_cut, comp);
+ distance(middle, second_cut, len22);
+ }
+ else {
+ len22 = len2 / 2;
+ advance(second_cut, len22);
+ first_cut = upper_bound(first, middle, *second_cut, comp);
+ distance(first, first_cut, len11);
+ }
+ BidirectionalIterator new_middle =
+ __rotate_adaptive(first_cut, middle, second_cut, len1 - len11,
+ len22, buffer, buffer_size);
+ __merge_adaptive(first, first_cut, new_middle, len11, len22, buffer,
+ buffer_size, comp);
+ __merge_adaptive(new_middle, second_cut, last, len1 - len11,
+ len2 - len22, buffer, buffer_size, comp);
+ }
+}
+
+template <class BidirectionalIterator, class T, class Distance>
+inline void __inplace_merge_aux(BidirectionalIterator first,
+ BidirectionalIterator middle,
+ BidirectionalIterator last, T*, Distance*) {
+ Distance len1 = 0;
+ distance(first, middle, len1);
+ Distance len2 = 0;
+ distance(middle, last, len2);
+
+ temporary_buffer<BidirectionalIterator, T> buf(first, last);
+ if (buf.begin() == 0)
+ __merge_without_buffer(first, middle, last, len1, len2);
+ else
+ __merge_adaptive(first, middle, last, len1, len2,
+ buf.begin(), Distance(buf.size()));
+}
+
+template <class BidirectionalIterator, class T, class Distance, class Compare>
+inline void __inplace_merge_aux(BidirectionalIterator first,
+ BidirectionalIterator middle,
+ BidirectionalIterator last, T*, Distance*,
+ Compare comp) {
+ Distance len1 = 0;
+ distance(first, middle, len1);
+ Distance len2 = 0;
+ distance(middle, last, len2);
+
+ temporary_buffer<BidirectionalIterator, T> buf(first, last);
+ if (buf.begin() == 0)
+ __merge_without_buffer(first, middle, last, len1, len2, comp);
+ else
+ __merge_adaptive(first, middle, last, len1, len2,
+ buf.begin(), Distance(buf.size()),
+ comp);
+}
+
+template <class BidirectionalIterator>
+inline void inplace_merge(BidirectionalIterator first,
+ BidirectionalIterator middle,
+ BidirectionalIterator last) {
+ if (first == middle || middle == last) return;
+ __inplace_merge_aux(first, middle, last, value_type(first),
+ distance_type(first));
+}
+
+template <class BidirectionalIterator, class Compare>
+inline void inplace_merge(BidirectionalIterator first,
+ BidirectionalIterator middle,
+ BidirectionalIterator last, Compare comp) {
+ if (first == middle || middle == last) return;
+ __inplace_merge_aux(first, middle, last, value_type(first),
+ distance_type(first), comp);
+}
+
+template <class InputIterator1, class InputIterator2>
+bool includes(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2) {
+ while (first1 != last1 && first2 != last2)
+ if (*first2 < *first1)
+ return false;
+ else if(*first1 < *first2)
+ ++first1;
+ else
+ ++first1, ++first2;
+
+ return first2 == last2;
+}
+
+template <class InputIterator1, class InputIterator2, class Compare>
+bool includes(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2, Compare comp) {
+ while (first1 != last1 && first2 != last2)
+ if (comp(*first2, *first1))
+ return false;
+ else if(comp(*first1, *first2))
+ ++first1;
+ else
+ ++first1, ++first2;
+
+ return first2 == last2;
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator>
+OutputIterator set_union(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2,
+ OutputIterator result) {
+ while (first1 != last1 && first2 != last2) {
+ if (*first1 < *first2) {
+ *result = *first1;
+ ++first1;
+ }
+ else if (*first2 < *first1) {
+ *result = *first2;
+ ++first2;
+ }
+ else {
+ *result = *first1;
+ ++first1;
+ ++first2;
+ }
+ ++result;
+ }
+ return copy(first2, last2, copy(first1, last1, result));
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator,
+ class Compare>
+OutputIterator set_union(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2,
+ OutputIterator result, Compare comp) {
+ while (first1 != last1 && first2 != last2) {
+ if (comp(*first1, *first2)) {
+ *result = *first1;
+ ++first1;
+ }
+ else if (comp(*first2, *first1)) {
+ *result = *first2;
+ ++first2;
+ }
+ else {
+ *result = *first1;
+ ++first1;
+ ++first2;
+ }
+ ++result;
+ }
+ return copy(first2, last2, copy(first1, last1, result));
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator>
+OutputIterator set_intersection(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2,
+ OutputIterator result) {
+ while (first1 != last1 && first2 != last2)
+ if (*first1 < *first2)
+ ++first1;
+ else if (*first2 < *first1)
+ ++first2;
+ else {
+ *result = *first1;
+ ++first1;
+ ++first2;
+ ++result;
+ }
+ return result;
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator,
+ class Compare>
+OutputIterator set_intersection(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2,
+ OutputIterator result, Compare comp) {
+ while (first1 != last1 && first2 != last2)
+ if (comp(*first1, *first2))
+ ++first1;
+ else if (comp(*first2, *first1))
+ ++first2;
+ else {
+ *result = *first1;
+ ++first1;
+ ++first2;
+ ++result;
+ }
+ return result;
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator>
+OutputIterator set_difference(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2,
+ OutputIterator result) {
+ while (first1 != last1 && first2 != last2)
+ if (*first1 < *first2) {
+ *result = *first1;
+ ++first1;
+ ++result;
+ }
+ else if (*first2 < *first1)
+ ++first2;
+ else {
+ ++first1;
+ ++first2;
+ }
+ return copy(first1, last1, result);
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator,
+ class Compare>
+OutputIterator set_difference(InputIterator1 first1, InputIterator1 last1,
+ InputIterator2 first2, InputIterator2 last2,
+ OutputIterator result, Compare comp) {
+ while (first1 != last1 && first2 != last2)
+ if (comp(*first1, *first2)) {
+ *result = *first1;
+ ++first1;
+ ++result;
+ }
+ else if (comp(*first2, *first1))
+ ++first2;
+ else {
+ ++first1;
+ ++first2;
+ }
+ return copy(first1, last1, result);
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator>
+OutputIterator set_symmetric_difference(InputIterator1 first1,
+ InputIterator1 last1,
+ InputIterator2 first2,
+ InputIterator2 last2,
+ OutputIterator result) {
+ while (first1 != last1 && first2 != last2)
+ if (*first1 < *first2) {
+ *result = *first1;
+ ++first1;
+ ++result;
+ }
+ else if (*first2 < *first1) {
+ *result = *first2;
+ ++first2;
+ ++result;
+ }
+ else {
+ ++first1;
+ ++first2;
+ }
+ return copy(first2, last2, copy(first1, last1, result));
+}
+
+template <class InputIterator1, class InputIterator2, class OutputIterator,
+ class Compare>
+OutputIterator set_symmetric_difference(InputIterator1 first1,
+ InputIterator1 last1,
+ InputIterator2 first2,
+ InputIterator2 last2,
+ OutputIterator result, Compare comp) {
+ while (first1 != last1 && first2 != last2)
+ if (comp(*first1, *first2)) {
+ *result = *first1;
+ ++first1;
+ ++result;
+ }
+ else if (comp(*first2, *first1)) {
+ *result = *first2;
+ ++first2;
+ ++result;
+ }
+ else {
+ ++first1;
+ ++first2;
+ }
+ return copy(first2, last2, copy(first1, last1, result));
+}
+
+template <class ForwardIterator>
+ForwardIterator max_element(ForwardIterator first, ForwardIterator last) {
+ if (first == last) return first;
+ ForwardIterator result = first;
+ while (++first != last)
+ if (*result < *first) result = first;
+ return result;
+}
+
+template <class ForwardIterator, class Compare>
+ForwardIterator max_element(ForwardIterator first, ForwardIterator last,
+ Compare comp) {
+ if (first == last) return first;
+ ForwardIterator result = first;
+ while (++first != last)
+ if (comp(*result, *first)) result = first;
+ return result;
+}
+
+template <class ForwardIterator>
+ForwardIterator min_element(ForwardIterator first, ForwardIterator last) {
+ if (first == last) return first;
+ ForwardIterator result = first;
+ while (++first != last)
+ if (*first < *result) result = first;
+ return result;
+}
+
+template <class ForwardIterator, class Compare>
+ForwardIterator min_element(ForwardIterator first, ForwardIterator last,
+ Compare comp) {
+ if (first == last) return first;
+ ForwardIterator result = first;
+ while (++first != last)
+ if (comp(*first, *result)) result = first;
+ return result;
+}
+
+template <class BidirectionalIterator>
+bool next_permutation(BidirectionalIterator first,
+ BidirectionalIterator last) {
+ if (first == last) return false;
+ BidirectionalIterator i = first;
+ ++i;
+ if (i == last) return false;
+ i = last;
+ --i;
+
+ for(;;) {
+ BidirectionalIterator ii = i;
+ --i;
+ if (*i < *ii) {
+ BidirectionalIterator j = last;
+ while (!(*i < *--j));
+ iter_swap(i, j);
+ reverse(ii, last);
+ return true;
+ }
+ if (i == first) {
+ reverse(first, last);
+ return false;
+ }
+ }
+}
+
+template <class BidirectionalIterator, class Compare>
+bool next_permutation(BidirectionalIterator first, BidirectionalIterator last,
+ Compare comp) {
+ if (first == last) return false;
+ BidirectionalIterator i = first;
+ ++i;
+ if (i == last) return false;
+ i = last;
+ --i;
+
+ for(;;) {
+ BidirectionalIterator ii = i;
+ --i;
+ if (comp(*i, *ii)) {
+ BidirectionalIterator j = last;
+ while (!comp(*i, *--j));
+ iter_swap(i, j);
+ reverse(ii, last);
+ return true;
+ }
+ if (i == first) {
+ reverse(first, last);
+ return false;
+ }
+ }
+}
+
+template <class BidirectionalIterator>
+bool prev_permutation(BidirectionalIterator first,
+ BidirectionalIterator last) {
+ if (first == last) return false;
+ BidirectionalIterator i = first;
+ ++i;
+ if (i == last) return false;
+ i = last;
+ --i;
+
+ for(;;) {
+ BidirectionalIterator ii = i;
+ --i;
+ if (*ii < *i) {
+ BidirectionalIterator j = last;
+ while (!(*--j < *i));
+ iter_swap(i, j);
+ reverse(ii, last);
+ return true;
+ }
+ if (i == first) {
+ reverse(first, last);
+ return false;
+ }
+ }
+}
+
+template <class BidirectionalIterator, class Compare>
+bool prev_permutation(BidirectionalIterator first, BidirectionalIterator last,
+ Compare comp) {
+ if (first == last) return false;
+ BidirectionalIterator i = first;
+ ++i;
+ if (i == last) return false;
+ i = last;
+ --i;
+
+ for(;;) {
+ BidirectionalIterator ii = i;
+ --i;
+ if (comp(*ii, *i)) {
+ BidirectionalIterator j = last;
+ while (!comp(*--j, *i));
+ iter_swap(i, j);
+ reverse(ii, last);
+ return true;
+ }
+ if (i == first) {
+ reverse(first, last);
+ return false;
+ }
+ }
+}
+
+template <class InputIterator, class ForwardIterator>
+InputIterator find_first_of(InputIterator first1, InputIterator last1,
+ ForwardIterator first2, ForwardIterator last2)
+{
+ for ( ; first1 != last1; ++first1)
+ for (ForwardIterator iter = first2; iter != last2; ++iter)
+ if (*first1 == *iter)
+ return first1;
+ return last1;
+}
+
+template <class InputIterator, class ForwardIterator, class BinaryPredicate>
+InputIterator find_first_of(InputIterator first1, InputIterator last1,
+ ForwardIterator first2, ForwardIterator last2,
+ BinaryPredicate comp)
+{
+ for ( ; first1 != last1; ++first1)
+ for (ForwardIterator iter = first2; iter != last2; ++iter)
+ if (comp(*first1, *iter))
+ return first1;
+ return last1;
+}
+
+
+// Search [first2, last2) as a subsequence in [first1, last1).
+
+// find_end for forward iterators.
+template <class ForwardIterator1, class ForwardIterator2>
+ForwardIterator1 __find_end(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2,
+ forward_iterator_tag, forward_iterator_tag)
+{
+ if (first2 == last2)
+ return last1;
+ else {
+ ForwardIterator1 result = last1;
+ while (1) {
+ ForwardIterator1 new_result = search(first1, last1, first2, last2);
+ if (new_result == last1)
+ return result;
+ else {
+ result = new_result;
+ first1 = new_result;
+ ++first1;
+ }
+ }
+ }
+}
+
+template <class ForwardIterator1, class ForwardIterator2,
+ class BinaryPredicate>
+ForwardIterator1 __find_end(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2,
+ forward_iterator_tag, forward_iterator_tag,
+ BinaryPredicate comp)
+{
+ if (first2 == last2)
+ return last1;
+ else {
+ ForwardIterator1 result = last1;
+ while (1) {
+ ForwardIterator1 new_result = search(first1, last1, first2, last2, comp);
+ if (new_result == last1)
+ return result;
+ else {
+ result = new_result;
+ first1 = new_result;
+ ++first1;
+ }
+ }
+ }
+}
+
+// find_end for bidirectional iterators. Requires partial specialization.
+#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
+
+template <class BidirectionalIterator1, class BidirectionalIterator2>
+BidirectionalIterator1
+__find_end(BidirectionalIterator1 first1, BidirectionalIterator1 last1,
+ BidirectionalIterator2 first2, BidirectionalIterator2 last2,
+ bidirectional_iterator_tag, bidirectional_iterator_tag)
+{
+ typedef reverse_iterator<BidirectionalIterator1> reviter1;
+ typedef reverse_iterator<BidirectionalIterator2> reviter2;
+
+ reviter1 rlast1(first1);
+ reviter2 rlast2(first2);
+ reviter1 rresult = search(reviter1(last1), rlast1, reviter2(last2), rlast2);
+
+ if (rresult == rlast1)
+ return last1;
+ else {
+ BidirectionalIterator1 result = rresult.base();
+ advance(result, -distance(first2, last2));
+ return result;
+ }
+}
+
+template <class BidirectionalIterator1, class BidirectionalIterator2,
+ class BinaryPredicate>
+BidirectionalIterator1
+__find_end(BidirectionalIterator1 first1, BidirectionalIterator1 last1,
+ BidirectionalIterator2 first2, BidirectionalIterator2 last2,
+ bidirectional_iterator_tag, bidirectional_iterator_tag,
+ BinaryPredicate comp)
+{
+ typedef reverse_iterator<BidirectionalIterator1> reviter1;
+ typedef reverse_iterator<BidirectionalIterator2> reviter2;
+
+ reviter1 rlast1(first1);
+ reviter2 rlast2(first2);
+ reviter1 rresult = search(reviter1(last1), rlast1, reviter2(last2), rlast2,
+ comp);
+
+ if (rresult == rlast1)
+ return last1;
+ else {
+ BidirectionalIterator1 result = rresult.base();
+ advance(result, -distance(first2, last2));
+ return result;
+ }
+}
+#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
+
+// Dispatching functions.
+
+template <class ForwardIterator1, class ForwardIterator2>
+inline ForwardIterator1
+find_end(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2)
+{
+#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
+ typedef typename iterator_traits<ForwardIterator1>::iterator_category
+ category1;
+ typedef typename iterator_traits<ForwardIterator2>::iterator_category
+ category2;
+ return __find_end(first1, last1, first2, last2, category1(), category2());
+#else /* __STL_CLASS_PARTIAL_SPECIALIZATION */
+ return __find_end(first1, last1, first2, last2,
+ forward_iterator_tag(), forward_iterator_tag());
+#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
+}
+
+template <class ForwardIterator1, class ForwardIterator2,
+ class BinaryPredicate>
+inline ForwardIterator1
+find_end(ForwardIterator1 first1, ForwardIterator1 last1,
+ ForwardIterator2 first2, ForwardIterator2 last2,
+ BinaryPredicate comp)
+{
+#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
+ typedef typename iterator_traits<ForwardIterator1>::iterator_category
+ category1;
+ typedef typename iterator_traits<ForwardIterator2>::iterator_category
+ category2;
+ return __find_end(first1, last1, first2, last2, category1(), category2(),
+ comp);
+#else /* __STL_CLASS_PARTIAL_SPECIALIZATION */
+ return __find_end(first1, last1, first2, last2,
+ forward_iterator_tag(), forward_iterator_tag(),
+ comp);
+#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
+}
+
+template <class RandomAccessIterator, class Distance>
+bool __is_heap(RandomAccessIterator first, RandomAccessIterator last,
+ Distance*)
+{
+ const Distance n = last - first;
+
+ Distance parent = 0;
+ for (Distance child = 1; child < n; ++child) {
+ if (first[parent] < first[child])
+ return false;
+ if (child & 1 == 0)
+ ++parent;
+ }
+ return true;
+}
+
+template <class RandomAccessIterator>
+inline bool is_heap(RandomAccessIterator first, RandomAccessIterator last)
+{
+ return __is_heap(first, last, distance_type(first));
+}
+
+
+template <class RandomAccessIterator, class Distance, class StrictWeakOrdering>
+bool __is_heap(RandomAccessIterator first, RandomAccessIterator last,
+ StrictWeakOrdering comp,
+ Distance*)
+{
+ const Distance n = last - first;
+
+ Distance parent = 0;
+ for (Distance child = 1; child < n; ++child) {
+ if (comp(first[parent], first[child]))
+ return false;
+ if (child & 1 == 0)
+ ++parent;
+ }
+ return true;
+}
+
+template <class RandomAccessIterator, class StrictWeakOrdering>
+inline bool is_heap(RandomAccessIterator first, RandomAccessIterator last,
+ StrictWeakOrdering comp)
+{
+ return __is_heap(first, last, comp, distance_type(first));
+}
+
+
+template <class ForwardIterator>
+bool is_sorted(ForwardIterator first, ForwardIterator last)
+{
+ if (first == last)
+ return true;
+
+ ForwardIterator next = first;
+ for (++next; next != last; first = next, ++next) {
+ if (*next < *first)
+ return false;
+ }
+
+ return true;
+}
+
+template <class ForwardIterator, class StrictWeakOrdering>
+bool is_sorted(ForwardIterator first, ForwardIterator last,
+ StrictWeakOrdering comp)
+{
+ if (first == last)
+ return true;
+
+ ForwardIterator next = first;
+ for (++next; next != last; first = next, ++next) {
+ if (comp(*next, *first))
+ return false;
+ }
+
+ return true;
+}
+
+#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
+#pragma reset woff 1209
+#endif
+
+__STL_END_NAMESPACE
+
+#endif /* __SGI_STL_INTERNAL_ALGO_H */
+
+// Local Variables:
+// mode:C++
+// End:
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