From 856afe175eea33d6d9c166f8a644b860e677903d Mon Sep 17 00:00:00 2001
From: Correl Roush <correl@gmail.com>
Date: Tue, 11 Oct 2011 22:31:31 -0400
Subject: [PATCH] Haskell 008

---
 haskell/e008.hs | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 haskell/e008.hs

diff --git a/haskell/e008.hs b/haskell/e008.hs
new file mode 100644
index 0000000..656a47b
--- /dev/null
+++ b/haskell/e008.hs
@@ -0,0 +1,34 @@
+{- Discover the largest product of five consecutive digits in the 1000-digit number. -}
+
+import Data.Char
+import Data.List
+import Text.Printf
+
+number = map digitToInt (
+    concat [
+    "73167176531330624919225119674426574742355349194934",
+    "96983520312774506326239578318016984801869478851843",
+    "85861560789112949495459501737958331952853208805511",
+    "12540698747158523863050715693290963295227443043557",
+    "66896648950445244523161731856403098711121722383113",
+    "62229893423380308135336276614282806444486645238749",
+    "30358907296290491560440772390713810515859307960866",
+    "70172427121883998797908792274921901699720888093776",
+    "65727333001053367881220235421809751254540594752243",
+    "52584907711670556013604839586446706324415722155397",
+    "53697817977846174064955149290862569321978468622482",
+    "83972241375657056057490261407972968652414535100474",
+    "82166370484403199890008895243450658541227588666881",
+    "16427171479924442928230863465674813919123162824586",
+    "17866458359124566529476545682848912883142607690042",
+    "24219022671055626321111109370544217506941658960408",
+    "07198403850962455444362981230987879927244284909188",
+    "84580156166097919133875499200524063689912560717606",
+    "05886116467109405077541002256983155200055935729725",
+    "71636269561882670428252483600823257530420752963450"
+    ]
+    )
+
+main = do
+    let sets = filter (\x -> length x == 5) (map (take 5) (tails number))
+    printf "Maximum product: %d\n" (maximum (map product sets))