LeetCode 4Sum
which gives the sum of target. Note:Elements in a qua ...
原文：[leetcode]4Sum @ Python
原題地址：http: oj.leetcode.com problems sum 題意：從數組中找到 個數，使它們的和為target。要求去重，可能有多組解，需要都找出來。 解題思路：一開始想要像 Sum那樣去解題，時間復雜度為O N ，可無論怎么寫都是Time Limited Exceeded。而同樣的算法使用C 是可以通過的。說明Python的執行速度比C 慢很多。還說明了一點，大概出題人的意思 ...
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