diff options
Diffstat (limited to 'mergesort.hs')
-rw-r--r-- | mergesort.hs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/mergesort.hs b/mergesort.hs new file mode 100644 index 0000000..5c140b3 --- /dev/null +++ b/mergesort.hs @@ -0,0 +1,19 @@ + + + +mergeSort :: Ord a => [a] -> [a] +mergeSort x | length x <= 1 = x +mergeSort x = + let n = (length x) `div` 2 + left = mergeSort (take n x) + right = mergeSort (drop n x) + in merge left right + + + +merge :: Ord a => [a] -> [a] -> [a] +merge [] y = y +merge x [] = x +merge (x:xs) (y:ys) = if x <= y then x:(merge xs (y:ys)) else y:(merge (x:xs) ys) + + |