#include <bits/stdc++.h>
using namespace std;
#define ll int
#define ii pair<ll,ll>
#define endl '\n'
const ll mod=1e9+7;
const ll maxn=4000+5;
set<ii> s;
vector<ll> adj[maxn];
ll vis[maxn][2];
ll cnt;
void dfs(ll a, ll p){
vis[a][0]=vis[a][1]=cnt++;
for (auto &u:adj[a]){
if (vis[u][1]!=-1){
if (u!=p){
vis[a][0]=min(vis[u][1],vis[a][0]);
}
continue;
}
dfs(u,a);
if (vis[u][0]>vis[a][1] && s.find(make_pair(u,a))==s.end()){
cout<<a<<' '<<u<<endl;
}
vis[a][0]=min(vis[u][0],vis[a][0]);
}
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
ll n,e,a,b;
cin>>n>>e;
for (int i=0;i<e;i++){
cin>>a>>b;
adj[a].emplace_back(b);
adj[b].emplace_back(a);
}
for (int i=1;i<=n;i++){
sort(adj[i].begin(),adj[i].end());
for (int j=0;j<max<int>(0,adj[i].size()-1);j++){
if (adj[i][j]==adj[i][j+1]){
s.emplace(i,adj[i][j]);
}
}
}
for (int i=1;i<=n;i++){
if (vis[i][1]!=-1) continue;
cnt=0;
dfs(i,-1);
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
332 KB |
Wrong number of edges |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
588 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
151 ms |
10116 KB |
Output is correct |
2 |
Runtime error |
218 ms |
19724 KB |
Memory limit exceeded |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
588 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
588 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
2 ms |
588 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
588 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
540 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
2 ms |
588 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
2 ms |
588 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |