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"""56. Merge IntervalsMedium1483116FavoriteShareGiven a collection of intervals, merge all overlapping intervals. Example 1: Input: [[1,3],[2,6],[8,10 阅读全文
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"""42. Trapping Rain WaterHard248947FavoriteShareGiven n non-negative integers representing an elevation map where the width of each bar is 1, compute 阅读全文
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"""93. Restore IP AddressesMedium473177 Given a string containing only digits, restore it by returning all possible valid IP address combinations. Exa 阅读全文
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"""32. Longest Valid ParenthesesHard134368 Given a string containing just the characters '(' and ')', find the length of the longest valid (well-forme 阅读全文