Update all new Tasks

2015-02-20 09:02:09 -05:00 · 2015-02-20 09:02:09 -05:00 · 91df62d461
commit 91df62d461
parent 00a190b0a6
5697 changed files with 93386 additions and 804 deletions
--- a/Task/Quickselect-algorithm/Standard-ML/quickselect-algorithm.ml
+++ b/Task/Quickselect-algorithm/Standard-ML/quickselect-algorithm.ml
@ -0,0 +1,12 @@
+fun quickselect (_, _, []) = raise Fail "empty"
+  | quickselect (k, cmp, x :: xs) = let
+        val (ys, zs) = List.partition (fn y => cmp (y, x) = LESS) xs
+        val l = length ys
+      in
+        if k < l then
+          quickselect (k, cmp, ys)
+        else if k > l then
+          quickselect (k-l-1, cmp, zs)
+        else
+          x
+      end