제출 #1005490

#제출 시각아이디문제언어결과실행 시간메모리
1005490vjudge1무제 (POI11_imp)C++17
27 / 100
31 ms1372 KiB
#include "bits/stdc++.h"
using namespace std;
using ll = long long;
bool v[1006][1006],r[1006];
int main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    ll n,m;
    cin>>n>>m;
    for(int i=0;i<m;i++){
        ll x,y;
        cin>>x>>y;
        v[x-1][y-1]=1;
    }
    for(int i=0;i<n;i++){
        if(r[i])continue;
        for(int j=i+1;j<n;j++){
            if(r[j])continue;
            if(!v[i][j]){
                r[i]=1;r[j]=1;
                break;
            }
        }
    }
    ll x=n/3;
    for(int i=0;i<n;i++){
        if(x==0)break;
        if(!r[i]){
            x--;
            cout<<i+1<<" ";
        }
    }
}
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