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题目如下： You are given a series of video clips from a sporting event that lasted Tseconds. These video clips can be overlapping with each other and have 阅读全文
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题目如下： A query word matches a given pattern if we can insert lowercaseletters to the pattern word so that it equals the query. (We may insert each char 阅读全文
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题目如下： Given a binary tree, each node has value 0 or 1. Each root-to-leaf path represents a binary number starting with the most significant bit. For e 阅读全文
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题目如下： A valid parentheses string is either empty (""), "(" + A + ")", or A + B, where A and B are valid parentheses strings, and + represents string c 阅读全文