/**
* author: BERNARD B.01
**/
#include <bits/stdc++.h>
using namespace std;
#ifdef B01
#include "deb.h"
#else
#define deb(...)
#endif
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n, m;
cin >> n >> m;
if (m != n - 1) {
cout << "NO" << '\n';
return 0;
}
vector<vector<int>> g(n);
for (int i = 0; i < m; i++) {
int u, v;
cin >> u >> v;
--u; --v;
g[u].push_back(v);
g[v].push_back(u);
}
cout << "YES" << '\n';
if (n == 1) {
cout << 1 << '\n';
cout << 1 << '\n';
return 0;
}
if (n == 2) {
cout << 2 << '\n';
cout << 1 << '\n';
cout << 1 << '\n';
return 0;
}
cout << 2 * n - 4 << '\n';
for (int i = 1; i < n - 1; i++) {
cout << i + 1 << '\n';
}
for (int i = n - 2; i >= 1; i--) {
cout << i + 1 << '\n';
}
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Partially correct |
0 ms |
212 KB |
Failed to provide a successful strategy. |
| 6 |
Partially correct |
0 ms |
212 KB |
Failed to provide a successful strategy. |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Partially correct |
0 ms |
212 KB |
Failed to provide a successful strategy. |
| 9 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 10 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
340 KB |
Output is correct |
| 12 |
Correct |
0 ms |
340 KB |
Output is correct |
| 13 |
Correct |
0 ms |
340 KB |
Output is correct |
| 14 |
Correct |
0 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Partially correct |
0 ms |
212 KB |
Failed to provide a successful strategy. |
| 6 |
Partially correct |
0 ms |
212 KB |
Failed to provide a successful strategy. |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Partially correct |
0 ms |
212 KB |
Failed to provide a successful strategy. |
| 9 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 10 |
Halted |
0 ms |
0 KB |
- |
