#pragma GCC optimize("Ofast") #include using namespace std; typedef long long int ll; typedef unsigned long long ull; mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); ll myRand(ll B) { return (ull)rng() % B; } struct UnionFind{ vector par,num; UnionFind(int n):par(n),num(n,1){ iota(par.begin(),par.end(),0); //include } int find(int v){ return (par[v]==v)?v:(par[v]=find(par[v])); } void unite(int u,int v){ u=find(u),v=find(v); if(u==v)return; if(num[u]> n; UnionFind uf(n); int cnt=0; for(int i=0;i> x >> y; x--; y--; if(!uf.same(x,y)){ uf.unite(x,y); cnt++; } string s; cin >> s; if(cnt==n-1){ cout << s << endl; cnt=n; } } }