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Submission #849980

# Submission time Handle Problem Language Result Execution time Memory
849980 2023-09-15T15:18:22 Z kyaruru Pipes (CEOI15_pipes) C++17
0 / 100
 1416 ms 65536 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

vector<int> adj[100001];
vector<int> tin(100001,-1),low(100001,-1);
bool vi[100001];
int t=0;


void dfs(int x,int p=-1){
    vi[x]=true;
    tin[x]=low[x]=t++;
    for(int u:adj[x]){
        if(u==p) continue;
        if(vi[u]){
            low[x]=min(low[x],tin[u]);
        }else{
            dfs(u,x);
            low[x]=min(low[x],low[u]);
            if(low[u]>tin[x]) cout<<u<<" "<<x<<"\n";
        }
    }
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    int a,b;
    cin>>a>>b;

    for(int i=0; i<b; i++){
        int x,y;
        cin>>x>>y;
        adj[x].push_back(y);
        adj[y].push_back(x);
    }

    for(int i=1; i<=a; i++){
        if(!vi[i]) dfs(i);
    }
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3420 KB Output is correct
2 Incorrect 1 ms 3420 KB Wrong number of edges
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3932 KB Output is correct
2 Incorrect 3 ms 3932 KB Wrong number of edges
3 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 85 ms 17232 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 155 ms 24660 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 310 ms 41808 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 542 ms 51304 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 810 ms 65536 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1071 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1255 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1416 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -