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Submission #118488

# Submission time Handle Problem Language Result Execution time Memory
118488 2019-06-19T05:39:30 Z SamAnd Pipes (CEOI15_pipes) C++17
10 / 100
 3313 ms 65536 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 100005;

int n, m;
vector<int> a[N];

bool c[N];
int tin[N], fup[N], ti;
void dfs(int x, int p)
{
    c[x] = true;
    fup[x] = tin[x] = ti++;
    for (int i = 0; i < a[x].size(); ++i)
    {
        int h = a[x][i];
        if (h == p)
            continue;
        if (c[h])
            fup[x] = min(fup[x], tin[h]);
        else
        {
            dfs(h, x);
            if (fup[h] > tin[x])
                cout << x << ' ' << h << endl;
            fup[x] = min(fup[x], fup[h]);
        }
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin >> n >> m;
    for (int i = 0; i < m; ++i)
    {
        int x, y;
        cin >> x >> y;
        a[x].push_back(y);
        a[y].push_back(x);
    }
    for (int i = 1; i <= n; ++i)
        if (!c[i])
            dfs(i, -1);
    return 0;
}

Compilation message

pipes.cpp: In function 'void dfs(int, int)':
pipes.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < a[x].size(); ++i)
                     ~~^~~~~~~~~~~~~

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 10 ms 3328 KB Output is correct
2 Incorrect 9 ms 3172 KB Wrong number of edges

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 150 ms 16248 KB Output is correct
2 Correct 159 ms 15616 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 316 ms 24000 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 694 ms 41560 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 1200 ms 52220 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 1864 ms 65536 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 2416 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 2849 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 3313 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -