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Submission #99655

# Submission time Handle Problem Language Result Execution time Memory
99655 2019-03-06T04:24:36 Z adlet Pipes (CEOI15_pipes) C++17
10 / 100
 5000 ms 64580 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 5;
int n, m, cnt, timer, fup[N], used[N], tin[N];
vector < int > g[N];
vector < pair < int, int > > ans;
inline void dfs(int v, int p = -1) {
    used[v] = 1;
    tin[v] = ++timer;
    fup[v] = timer;
    for (int to : g[v]) {
        if (to == p)
            continue;
        if (used[to])
            fup[v] = min(fup[v], tin[to]);
        else {
            dfs(to, v);
            fup[v] = min(fup[v], fup[to]);
            if (fup[to] > tin[v])
                ans.push_back({v, to});
        }
    }
}

int main() {
    cin >> n >> m;
    for (int i = 1; i <= m; ++i) {
        int v, u;
        cin >> v >> u;
        g[v].push_back(u);
        g[u].push_back(v);
    }
    for (int i = 1; i <= n; ++i) {
        if (!used[i]) {
            dfs(i);
        }
    }
    for (auto i : ans)
        cout << i.first << " " << i.second << "\n";
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Incorrect 4 ms 2688 KB Wrong number of edges

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 3072 KB Output is correct
2 Incorrect 11 ms 3072 KB Wrong number of edges

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 334 ms 10732 KB Output is correct
2 Correct 326 ms 10112 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 667 ms 14132 KB Output is correct
2 Runtime error 832 ms 18576 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1340 ms 24756 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1857 ms 29548 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2929 ms 51080 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 4237 ms 64580 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5009 ms 58908 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5081 ms 59852 KB Time limit exceeded
2 Halted 0 ms 0 KB -