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3sum
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| class Solution: | |
| def threeSum(self, nums): | |
| """ | |
| :type nums: List[int] | |
| :rtype: List[List[int]] | |
| """ | |
| nums.sort | |
| solutions = [] | |
| d = {} | |
| inx = 0 | |
| # build index | |
| for num in nums: | |
| d[num] = d.get(num, []).append(inx) | |
| inx += 1 | |
| # loop | |
| for i in len(nums): | |
| if nums[i] > 0: | |
| return solutions | |
| for j in range(i+1, len(nums)): | |
| sp = 0 - nums[i] - nums[j] | |
| if sp in d: | |
| for s in d[sp]: | |
| if s > j: | |
| solutions.append([nums[i],nums[j],nums[s]]) | |
| return solutions | |
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