mirror of
https://github.com/correl/euler.git
synced 2024-11-24 03:00:08 +00:00
35 lines
1.5 KiB
Haskell
35 lines
1.5 KiB
Haskell
|
{- 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))
|