Add Haskell solution for Problem 30

Haskell/p030.hs

@@ -0,0 +1,24 @@
+-- Surprisingly there are only three numbers that can be written as the sum of fourth powers of their digits:
+--
+-- 1634 = 1^4 + 6^4 + 3^4 + 4^4
+-- 8208 = 8^4 + 2^4 + 0^4 + 8^4
+-- 9474 = 9^4 + 4^4 + 7^4 + 4^4
+--
+-- As 1 = 1^4 is not a sum it is not included.
+--
+-- The sum of these numbers is 1634 + 8208 + 9474 = 19316.
+--
+-- Find the sum of all the numbers that can be written as the sum of fifth powers of their digits.
+
+import Data.Char (digitToInt)
+
+sumNthPowerDigit :: Int -> Int -> Int
+sumNthPowerDigit p n = sum [ x^p | x <- map digitToInt (show n) ]
+
+equalsSumNthPowerDigit :: Int -> Int -> Bool
+equalsSumNthPowerDigit p n = n == sumNthPowerDigit p n
+
+main = do
+    let result = sum $ filter (equalsSumNthPowerDigit 5) [10..354295]
+    putStrLn $ "Project Euler, Problem 30\n"
+        ++ "Answer: " ++ show result