Submission #843149

#	Time	Username	Problem	Language	Result	Execution time	Memory
843149		grogu	Povjerenstvo (COI22_povjerenstvo)	C++14	100 / 100	574 ms	64836 KiB

Main

#define here cerr<<"===========================================\n"
#define dbg(x) cerr<<#x<<": "<<x<<endl;
#include <bits/stdc++.h>
#define ld double
#define ll long long
#define ull unsigned long long
#define llinf 100000000000000000LL // 10^17
#define iinf 2000000000 // 2*10^9
#define pb push_back
#define eb emplace_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define all(a) a.begin(),a.end()
#define ceri(a,l,r) {cerr<<#a<<": ";for(ll i_ = l;i_<=r;i_++) cerr<<a[i_]<< " ";cerr<<endl;}
#define cer(a) {cerr<<#a<<": ";for(ll x_ : a) cerr<<x_<< " ";cerr<<endl;}
#define si(a) (ll)(a.size())
using namespace std;

#define maxn 500005
ll n,m;
vector<ll> g[maxn];
set<ll> s;
void tc(){
    cin >> n >> m;
    for(ll i = 1;i<=m;i++){
        ll x,y; cin >> x >> y;
        g[x].pb(y);
        g[y].pb(x);
    }
    for(ll i = 1;i<=n;i++) s.insert(i);
    vector<ll> ans;
    while(si(s)){
        ll x = *s.begin();
        s.erase(s.begin());
        ans.pb(x);
        for(ll x : g[x]){
            if(s.find(x)!=s.end()) s.erase(s.find(x));
        }
    }
    cout<<si(ans)<<endl;
    for(ll x : ans) cout<<x<<" ";
    cout<<endl;
}

int main(){
	ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
	int t; t = 1;
	while(t--){
		tc();
	}
	return (0-0);
}

• Subtask 1: 13 / 13
• Subtask 2: 21 / 21
• Subtask 3: 33 / 33
• Subtask 4: 33 / 33