MMedium· two-pointers· array· sorting
3Sum
3Sum
Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i, j, and k are distinct indices and nums[i] + nums[j] + nums[k] == 0.
The solution set must not contain duplicate triplets.
Example
Input: nums = [-1, 0, 1, 2, -1, -4]
Output: [[-1, -1, 2], [-1, 0, 1]]
Constraints
- 3 <= nums.length <= 3000
- -10^5 <= nums[i] <= 10^5
Entry — threeSum
Grading — set_of_sets over 4 tests