이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
bool adj[3000][3000];
bool dead[3000];
int main() {
cin.tie(0)->sync_with_stdio(0);
int n, m; cin >> n >> m;
for (int i = 0; i < m; i++) {
int a, b; cin >> a >> b; --a; --b;
adj[a][b] = 1; adj[b][a] = 1;
}
for (int i = 0; i < n; i++) {
for (int j = i+1; j < n; j++) {
if (!dead[i] && !dead[j] && !adj[i][j]) {
dead[i] = dead[j] = 1;
}
}
}
int ct = 0;
for (int i = 0; i < n; i++) {
if (!dead[i]) {
cout << i+1 << " ";
ct++;
if (ct == n*2/3) break;
}
}
cout << endl;
return 0;
}
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