#include <bits/stdc++.h>
using namespace std;
const int MAX_N = 1e3;
bool vis[MAX_N + 1], side[MAX_N + 1];
vector<int> adj[MAX_N + 1];
bool checkBipartite( int u ) {
vis[u] = true;
bool ok = true;
for ( int v: adj[u] ) {
if ( !vis[v] ) {
side[v] = side[u] ^ 1;
ok &= checkBipartite( v );
} else if ( side[v] == side[u] )
ok = false;
}
return ok;
}
int main() {
int n, m;
cin >> n >> m;
for ( int i = 0; i < m; i++ ) {
int u, v;
cin >> u >> v;
adj[u].push_back( v );
adj[v].push_back( u );
}
if ( m != n - 1 ) {
cout << "NO\n";
return 0;
}
cout << "YES\n";
cout << 2 * n - 4 << "\n";
for ( int i = 2; i <= n - 1; i++ )
cout << i << " ";
for ( int i = n - 1; i >= 2; i-- )
cout << i << " ";
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
348 KB |
Integer parameter [name=k] equals to -2, violates the range [1, 5] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
344 KB |
Integer parameter [name=k] equals to -2, violates the range [1, 5] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
348 KB |
Integer parameter [name=k] equals to -2, violates the range [1, 5] |
2 |
Halted |
0 ms |
0 KB |
- |