2020杭電HDU-6763多校第二場Total Eclipse（並查集）

題目連接：http://acm.hdu.edu.cn/showproblem.php?pid=6763 博客園食用連接：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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