제출 #1099462

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
1099462	2024-10-11 10:17:33	pokmui9909	Povjerenstvo (COI22_povjerenstvo)	C++17	100 / 100	217 ms	44564 KiB

Main

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define x first
#define y second
ll N, M, used[500005];
vector<ll> G[500005];
int main(){
    cin.tie(0) -> sync_with_stdio(0);
    cin >> N >> M;
    for(ll i = 1; i <= M; i++){
        ll u, v; cin >> u >> v;
        G[u].push_back(v); G[v].push_back(u);
    }
    vector<ll> R;
    for(ll i = 1; i <= N; i++){
        if(used[i]) continue;
        for(auto v : G[i]){
            used[v] = 1;
        }
        R.push_back(i);
    }
    cout << R.size() << '\n';
    for(auto e : R){
        cout << e << ' ';
    }
 
 
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