#include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; typedef long long ll; const int inf=1<<30; const ll INF=1LL<<62; typedef pair P; typedef pair PP; const ll MOD=998244353; int main(){ int N,M; cin>>N>>M; vector> G(N); for(int i=0;i>u>>v; u--;v--; G[u].push_back(v); G[v].push_back(u); } queue

que; vector dist(N,inf); dist[0]=0; que.push(P{0,0});//距離,頂点 while(!que.empty()){ auto [d,v]=que.front(); que.pop(); //dist[v]>d for(int to:G[v]){ if(dist[to]==inf){ dist[to]=d+1; que.push(P{d+1,to}); } } } vector cnt(N+1,0);//0~N for(int i=0;i