Add Haskell solution for Problem 24

Haskell/p024.hs

@@ -0,0 +1,13 @@
+-- A permutation is an ordered arrangement of objects. For example, 3124 is one possible permutation of the digits 1, 2, 3 and 4.
+-- If all of the permutations are listed numerically or alphabetically, we call it lexicographic order. The lexicographic permutations of 0, 1 and 2 are:
+--
+-- 012   021   102   120   201   210
+--
+-- What is the millionth lexicographic permutation of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9?
+
+import Data.List
+
+main = do
+    let result = sort (permutations "0123456789") !! 999999
+    putStrLn $ "Project Euler, Problem 24\n"
+        ++ "Answer: " ++ result