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Submission #527167

# Submission time Handle Problem Language Result Execution time Memory
527167 2022-02-17T03:06:55 Z joelau Pipes (CEOI15_pipes) C++14
10 / 100
 1719 ms 65540 KB 
#include <bits/stdc++.h>
using namespace std;

int N,M, num[100005], low[100005], p[100005], cnt = 0;
vector<int> lst[100005];

void dfs (int u) {
    low[u] = num[u] = cnt++;
    for (int v: lst[u]) {
        if (num[v] == -1) {
            p[v] = u;
            dfs(v);
            if (low[v] > num[u])
                cout << u+1 << ' ' << v+1 << '\n';
            low[u] = min(low[u],low[v]);
        }
        else if (v != p[u])
            low[u] = min(low[u],num[v]);
    }
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    cin >> N >> M;
    for (int i = 0; i < M; ++i) {
        int u,v; cin>> u >> v; u--, v--;
        lst[u].push_back(v), lst[v].push_back(u);
    }
    memset(num,-1,sizeof(num));
    for (int i = 0; i < N; ++i) if (num[i] == -1) dfs(i);

    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3020 KB Output is correct
2 Incorrect 2 ms 3020 KB Wrong number of edges
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 3660 KB Output is correct
2 Incorrect 5 ms 3404 KB Wrong number of edges
3 Halted 0 ms 0 KB -

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 121 ms 13564 KB Output is correct
2 Correct 106 ms 12868 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 191 ms 17152 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 411 ms 28840 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 547 ms 33424 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 927 ms 55528 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1311 ms 65540 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 1609 ms 65540 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 1719 ms 65540 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -