-- Ambiguity error reporting

module Main where

import Data.Array.MArray (thaw,freeze)
import Data.Array.Unboxed as UA (UArray,listArray)
import Data.Array.IArray as IA (Array,listArray)

main :: IO ()
main = do let sL = [1,4,6,3,2,5]
              dim = length sL
              help :: [FlatVector]
              help = [listFlatVector (1,s) [0|i<-[1..s]]|s<-sL]
              tmp :: Vector FlatVector
              tmp = listVector (1,dim) help
          v <- thaw tmp
          return ()

type FlatVector  = UArray Int Double

listFlatVector :: (Int,Int) -> [Double] -> FlatVector
listFlatVector = UA.listArray

type Vector a = Array Int a

listVector :: (Int,Int) -> [a] -> Vector a
listVector = IA.listArray