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Once upon a time there lived a good fairy A. One day a fine young man B came to her and asked to predict his future. The fairy looked into her magic b 阅读全文
posted @ 2018-02-10 22:21
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Problem Statement Definition Notes Constraints Examples 传送门 代码 //将每一片海和岛看做一个点，构图发现这是一棵树 #include<iostream>#include<cstdio>#include<cstring>#include<st 阅读全文
posted @ 2018-02-10 08:10
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