#include using namespace std; using ll = long long; using uns= unsigned long long; #define rep(i,a,b) for(ll i = (a); i < (b); i++) int main() { int N,M; cin>>N>>M; vector> data(N+1); rep(i,0,M){ int a,b; cin>>a>>b; if(!data.at(b).count(a)){ for(int t:data.at(b)){ data.at(a).insert(t); } data.at(a).insert(b); cout<<0<