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Two Pointers/medium

3Sum

two-pointers3sum

3Sum

Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k, and nums[i] + nums[j] + nums[k] == 0.

Notice that the solution set must not contain duplicate triplets.

Example 1

Input: nums = [-1,0,1,2,-1,-4]
Output: [[-1,-1,2],[-1,0,1]]

Example 2

Input: nums = [0,1,1]
Output: []

Constraints

  • 3 <= nums.length <= 3000
  • -10^5 <= nums[i] <= 10^5

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Input:
{
  "nums": [
    -1,
    0,
    1,
    2,
    -1,
    -4
  ]
}
Expected Output:
[
  [
    -1,
    -1,
    2
  ],
  [
    -1,
    0,
    1
  ]
]