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Submission #948556

# Submission time Handle Problem Language Result Execution time Memory
948556 2024-03-18T07:52:17 Z huyboy Pipes (CEOI15_pipes) C++17
20 / 100
 88 ms 16332 KB 
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

const short N = 5001;

vector<pair<short,int>> g[N];

vector<short> tin(N), low(N);

void dfs(short v, short p, vector<bool>& vis, short& timer) {
    vis[v] = true;
    tin[v] = low[v] = timer++;
    for (auto [to, check] : g[v]) {
        if (check == p)
            continue;
        if(vis[to]){
			low[v] = min(low[v], low[to]);
		} else{
			dfs(to, check, vis, timer);
			low[v] = min(low[v], low[to]);
			if (low[to] > tin[v])
				cout << v << " " << to << "\n";	
		}
        
    }
}

void solve(){
    short n;
    int m;
    cin >> n >> m;
    for(int i = 0; i < m; i++){
        short a, b;
        cin >> a >> b;
        g[a].emplace_back(b, i);
        g[b].emplace_back(a, i);
    }
    vector<bool> vis(n, false);
    short timer = 0;
    for(short i = 0; i < n; i++){
        if(!vis[i]){
            dfs(i, -1, vis, timer);
        }
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    int t = 1;
    // cin >> t;
    while(t--){
        solve();
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1112 KB Output is correct
2 Correct 3 ms 856 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 88 ms 16332 KB Output is correct
2 Incorrect 82 ms 15140 KB Wrong number of edges
3 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 856 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 860 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 860 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 860 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 856 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 860 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 860 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -