摘要:
学习粗:https://www.cnblogs.com/chenxiaoran666/p/prufer.html 阅读全文
摘要:
入门题:https://www.luogu.com.cn/problem/P1337 #include<cstdio> #include<cmath> #include<ctime> #include<cstdlib> #define RG register #define R RG long do 阅读全文