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Haskell 008

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Correl Roush 2011-10-11 22:31:31 -04:00
parent 2789b1160f
commit 856afe175e
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{- 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))