摘要：https://blog.csdn.net/qq_21997625/article/details/84672775 阅读全文

摘要：https://blog.csdn.net/m0_37809890/article/details/83109136 阅读全文

摘要：#include<bits/stdc++.h> using namespace std; inline long long read(){ long long num=0;int z=1;char c=getchar(); if(c=='-') z=-1; while((c<'0'||c>'9')& 阅读全文

摘要：LCA+树上差分 #include <bits/stdc++.h> using namespace std; #define maxn 50010 #define ll long long #define res register int struct Node{ int to,next; }; N 阅读全文