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21 days ago
472 B
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Array access class Solution: def threeSum(self, nums: List[int]) -> List[List[int]]: sums, seen = set(), set() for i, num in enumerate(nums): if i == 0 or nums != nums[i-1]: seen = set() for num2 in nums[i+1:]: num3 = -(num+num2) if num3 in seen: sums.add(tuple(sorted([num, num2, num3]))) seen.add(num2) return sums