solution.py

from typing import List


class Solution:
    def threeSum(self, nums: List[int]) -> List[List[int]]:
        res = []
        nums.sort()

        for i, num in enumerate(nums):
            if i > 0 and num == nums[i - 1]:
                continue

            left, right = i + 1, len(nums) - 1
            while left < right:
                threeSum = num + nums[left] + nums[right]
                if threeSum > 0:
                    right -= 1
                elif threeSum < 0:
                    left += 1
                else:
                    res.append([num, nums[left], nums[right]])
                    left += 1
                    right -= 1
                    while nums[left] == nums[left - 1] and left < right:
                        left += 1
                    while nums[right] == nums[right + 1] and left < right:
                        right -= 1
        return res


if __name__ == '__main__':
    nums = [-1, 0, 1, 2, -1, -4]
    print(Solution().threeSum(nums))