Submission #1178726

#	Time	Username	Problem	Language	Result	Execution time	Memory
1178726		ZeroCool	Povjerenstvo (COI22_povjerenstvo)	C++20	100 / 100	140 ms	34764 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;


#define int long long
#define ll long long
#define ld long double
#define ar array
#define all(v) v.begin(), v.end()

using namespace std;



const int N = 5e5 + 20;
const int LOG = 20;
const int INF = 1e12;
const int MOD = 1e9 + 7;

void chmin(int &x,int y){x = min(x, y);};
void chmax(int &x,int y){x = max(x, y);};
void mm(int &x){x = (x % MOD + MOD) % MOD;};

vector<int> g[N];

signed main(){ios_base::sync_with_stdio(false);cin.tie(0);
    int n, m;
    cin>>n>>m;
    while(m--){
        int a, b;
        cin>>a>>b;
        --a, --b;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    vector<int> ans;
    bool b[n] = {0};
    for(int i = 0;i < n;i++){
        if(!b[i]){
            for(auto u: g[i])b[u] = 1;
        }
    }
    for(int i = 0;i < n;i++){
        if(!b[i])ans.push_back(i + 1);
    }
    cout<<ans.size()<<'\n';
    for(auto u: ans)cout<<u<<' ';
    
}

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