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原题链接在这里:https://leetcode.com/problems/valid-tic-tac-toe-state/ 题目: A Tic-Tac-Toe board is given as a string array board. Return True if and only if it 阅读全文
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原题链接在这里:https://leetcode.com/problems/design-search-autocomplete-system/ 题目: Design a search autocomplete system for a search engine. Users may input 阅读全文
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原题链接在这里:https://leetcode.com/problems/longest-absolute-file-path/ 题目: Suppose we abstract our file system by a string in the following manner: The str 阅读全文
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原题链接在这里:https://leetcode.com/problems/rotated-digits/ 题目: X is a good number if after rotating each digit individually by 180 degrees, we get a valid 阅读全文