Solution for LeetCode 3sum
Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.
The solution set must not contain duplicate triplets.
Given array nums = [-1, 0, 1, 2, -1, -4],
A solution set is:
For time optimization, we need to sort the given array. Then enumerate the elements from index 0(assume value v0), try to find the 2 elements which some sum of them is -v0.
Time complexity is: $$ O(N^2) $$
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