#include #define rep(i,n) for(int i=0;i<(n);i++) using namespace std; using graph=vector>; void add_undirected_edge(graph& G,int u,int v){ G[u].emplace_back(v); G[v].emplace_back(u); } vector distance(const graph& G,int s){ const int INF=INT_MAX; int n=G.size(); vector d(n,INF); d[s]=0; queue Q; Q.emplace(s); while(!Q.empty()){ int u=Q.front(); Q.pop(); for(int v:G[u]) if(d[v]==INF) { d[v]=d[u]+1; Q.emplace(v); } } return d; } class union_find{ int n; vector p; public: union_find(int n):n(n),p(n,-1){} int find(int u){ return p[u]<0?u:p[u]=find(p[u]); } void unite(int u,int v){ u=find(u); v=find(v); if(u!=v){ if(p[v]0) cnt++, L/=2; printf("%d %d\n",U.size(s)-1,cnt); } return 0; }