Distance on the tree DSM(Data Structure Master) once learned about tree when he was preparing for NOIP(National Olympiad in Informatics in Provinces) in Senior High School. So when in Data Structure Class in College, he is always absent-minded about…
#include<cstdio> #include<cmath> #include<algorithm> using namespace std; #define N 50001 #define SQRT 227 int n,m,xs[N],ys[N],ks[N],op[N],en,ma[100001],en2,a[100001]; int num[N],l[SQRT],r[SQRT],sumv[SQRT],sum=1;//分块 int num2[100001],l2[…
Tree Time Limit: 5000MS Memory Limit: 131072K Total Submissions: 12247 Accepted: 3151 Description You are given a tree with N nodes. The tree’s nodes are numbered 1 through N and its edges are numbered 1 through N − 1. Each edge is associated wit…