Tag: Grisha and Underground Solution In C/C++

#include<cstdio> #include<iostream> using namespace std; struct Edge{ int to,next; }e; int head,cnt=0; void add(int u,int v) { cnt++; e.to=v; e.next=head; head=cnt; } int anc; int dep; void dfs(int x,int fa) { for(int i=head;i!=0;i=e.next) { int to=e.to; if(to!=fa) { dep=dep+1; anc=x; dfs(to,x); } } } int lca(int...