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authorShinya Sato <shinnya.sato@gmail.com>2022-05-30 20:36:38 +0900
committerShinya Sato <shinnya.sato@gmail.com>2022-05-30 20:36:38 +0900
commite18b27f43ac23689822d4aaaaa3e8d550e41017a (patch)
tree262150d7ad6abc6759f41a7adbb6dec4a7c90cb5 /comparison/Haskell/bsort-20000.hs
parent04cbbcc0649dfc80d8dbf8c4bc567285df7a9da4 (diff)
downloadinpla-e18b27f43ac23689822d4aaaaa3e8d550e41017a.tar.gz
inpla-e18b27f43ac23689822d4aaaaa3e8d550e41017a.zip
v0.8.2-2
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diff --git a/comparison/Haskell/bsort-20000.hs b/comparison/Haskell/bsort-20000.hs
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+{-
+https://gist.github.com/masquerade0324/68f4f3fd3ab897fbe1ad
+http://files.farka.eu/pub/AC21007/lec5.pdf
+-}
+
+import System.Random
+
+bs xs 0 = xs
+bs (x:y:ys) n =
+ if x<y then x:(bs (y:ys) (n-1))
+ else y:(bs (x:ys) (n-1))
+bs xs n = xs
+
+
+go xs 0 = xs
+go xs n = go (bs xs n) (n-1)
+
+bsort [] = []
+bsort xs = go xs (length xs -1)
+
+{-
+main = print $ bsort [3,2,8,5]
+-}
+
+
+randomList :: Int -> IO([Int])
+randomList 0 = return []
+randomList n = do
+ r <- randomRIO (1,10000)
+ rs <- randomList (n-1)
+ return (r:rs)
+
+
+validation [] = True
+validation (x:xs) = validation_cons x xs
+validation_cons x [] = True
+validation_cons x (y:ys) =
+ if x<=y then validation_cons y ys
+ else False
+
+
+main = do
+ list <- randomList 20000
+ let sorted = bsort list
+ print (validation sorted)