LeetCode 15. 三數之和（3Sum）
題目描述 給定一個包含 n 個整數的數組 nums，判斷 nums 中是否存在三個元素 a，b，c ，使得 a + b + c = 0 ？找出所有滿足條件且不重復的三元組。 注 ...
原文：[LeetCode]21. 3Sum三者之和
Given an arraySofnintegers, are there elementsa,b,cinSsuch thata b c Find all unique triplets in the array which gives the sum of zero. Note: Elements in a triplet a,b,c must be in non descending orde ...
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原題地址：http://oj.leetcode.com/problems/3sum/ 題意：從一個數組中找到三個數，使這三個數的和為0。有可能存在多組解，也有可能存在重復的解，所以需要去重。比如：num=[-1,0,1,2,-1,-4];那么存在兩組解：[[-1,0,1],[-1,-1,2 ...
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