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37. Sudoku Solver Hard 95062FavoriteShare 37. Sudoku Solver Hard 95062FavoriteShare Hard Write a program to solve a Sudoku puzzle by filling the empty 阅读全文
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32. Longest Valid Parentheses Hard 199995FavoriteShare Given a string containing just the characters '(' and ')', find the length of the longest valid 阅读全文
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39. Combination Sum Medium 216868FavoriteShare 39. Combination Sum Medium 216868FavoriteShare Medium Given a set of candidate numbers (candidates) (wi 阅读全文