2020杭电HDU-6763多校第二场Total Eclipse（并查集）

题目连接：http://acm.hdu.edu.cn/showproblem.php?pid=6763 博客园食用连接：https://www.cnblogs.com/lonely-wind-/p/13383968.htmlphp Problem Description There are n cities and m bidirectional roads in Byteland. These

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