From a9abc1da41b56edbed00081800382e854d6698d0 Mon Sep 17 00:00:00 2001 From: Joe Zhao Date: Tue, 31 Mar 2015 23:41:55 +0800 Subject: rename to H**, +31 +32 +33 +34 +35 +36 --- H25.hs | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 H25.hs (limited to 'H25.hs') diff --git a/H25.hs b/H25.hs new file mode 100644 index 0000000..d590fce --- /dev/null +++ b/H25.hs @@ -0,0 +1,8 @@ +import System.Random + +rnd_permu :: [a] -> IO [a] +rnd_permu [] = return [] +rnd_permu (x:xs) = do + rand <- randomRIO (0, (length xs)) + rest <- rnd_permu xs + return $ let (ys,zs) = splitAt rand rest in ys++(x:zs) -- cgit v1.2.3-70-g09d2