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就类似于这道题的形式输出树边。每行两个数 a,b 表示 a 是 b 的父亲。
The text was updated successfully, but these errors were encountered:
能不能有除了dfs一遍以外的其他方法?
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Cu Ball
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就类似于这道题的形式输出树边。每行两个数 a,b 表示 a 是 b 的父亲。
The text was updated successfully, but these errors were encountered: