摘要：CF-E. Messenger Simulator Polycarp is a frequent user of the very popular messenger. He's chatting with his friends all the time. He has n friends, nu 阅读全文

摘要：伸展树 多值版 #include<bits/stdc++.h> using namespace std; template<class T> inline bool read(T &x){ x=0;register char c=getchar();register bool f=0; while( 阅读全文