[LeetCode] 18. 4Sum 四數之和
which gives the sum of target. Note: Elements ...
原文：[LeetCode] 18. 4Sum ☆☆
Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata b c d target Find all unique quadruplets in the array which gives the sum of target. Note:The solution set must not contain dupl ...
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[leetcode]4Sum @ Python
原題地址：http://oj.leetcode.com/problems/4sum/ 題意：從數組中找到4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3Sum那樣去解題，時間復雜度為O(N^3)，可無論怎么寫都是Time Limited ...
LeetCode 4Sum
which gives the sum of target. Note:Elements in a qua ...
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