LeetCode 4Sum
which gives the sum of target. Note:Elements in a qua ...
原文：[leetcode]4Sum @ Python
原题地址：http: oj.leetcode.com problems sum 题意：从数组中找到 个数，使它们的和为target。要求去重，可能有多组解，需要都找出来。 解题思路：一开始想要像 Sum那样去解题，时间复杂度为O N ，可无论怎么写都是Time Limited Exceeded。而同样的算法使用C 是可以通过的。说明Python的执行速度比C 慢很多。还说明了一点，大概出题人的意思 ...
2014-04-29 15:46 2 6046 推荐指数：
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