tools/hashTest.hs
author antonc27 <antonc27@mail.ru>
Sun, 18 Mar 2018 18:47:03 +0100
branchios-develop
changeset 13250 195208deff1d
parent 9464 901e363d5837
permissions -rw-r--r--
- Correct initialisation of TeamsGameOver (on mobile it doesn't get reset between plays, so ones set to true, prevents game to be finished next time)

module Test where

import Control.Monad
import Data.Word
import qualified Data.IntSet as IS

data OP = Sum
        | Mul
        | Sub
    deriving Show


genOps :: Int -> [[OP]]
genOps 1 = [[Sum], [Mul], [Sub]]
genOps n = [a : as | a <- [Sum, Mul, Sub], as <- genOps (n - 1)]


genPos :: Int -> Int -> [[Int]]
genPos m 1 = map (:[]) [-m..m - 1]
genPos m n = [a : as | a <- [-m..m - 1], as <- genPos m (n - 1)]


hash :: [Int] -> [OP] -> [Int] -> Int
hash poss op s = foldl applyOp s' (zip ss op)
    where
        applyOp v (n, Sum) = (v + n) `mod` 256
        applyOp v (n, Mul) = (v * n) `mod` 256
        applyOp v (n, Sub) = (v - n) `mod` 256
        (s' : ss) = map (\p -> if p >= 0 then s !! p else s !! (l + p)) poss
        l = length s


test = do
    a <- liftM lines getContents
    let w = minimum $ map length a
    let opsNum = 4
    let opsList = genOps (opsNum - 1)
    let posList = genPos w opsNum
    let target = length a
    let wordsList = map (map fromEnum) a
    let hashedSize = IS.size . IS.fromList
    print $ length a
    putStrLn . unlines . map show $ filter (\l -> fst l == length a) $ [(hs, (p, o)) | p <- posList, o <- opsList, let hs = hashedSize . map (hash p o) $ wordsList]

didIunderstand' = do
    a <- liftM lines getContents
    print $ length a
    print . IS.size . IS.fromList . map (testHash . map fromEnum) $ a
    where
        testHash s = let l = length s in (
                         (s !! (l - 2) * s !! 1) + s !! (l - 1) - s !! 0
                         ) `mod` 256