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Submission #975238

# Submission time Handle Problem Language Result Execution time Memory
975238 2024-05-04T15:15:46 Z duckindog Pipes (CEOI15_pipes) C++17
0 / 100
 1522 ms 65536 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 100'000 + 1;
int n, m;
vector<int> ad[N];
int low[N], num[N], it;

void dfs(int u, int p = -1) { 
  low[u] = num[u] = ++it;

  for (const auto& v : ad[u]) { 
    if (v == p) continue;

    if (!low[v]) {
      dfs(v, u);
      low[u] = min(low[u], low[v]);
      if (low[v] == num[v]) cout << u << " " << v << "\n";
    } else low[u] = min(low[u], num[v]);
  }
}

int32_t main() { 
  cin.tie(0)->sync_with_stdio(0);

  cin >> n >> m;
  for (int i = 1; i <= m; ++i) { 
    int u, v; cin >> u >> v;
    ad[u].push_back(v);
    ad[v].push_back(u);
  }

  for (int i = 1; i <= n; ++i) if (!low[i]) dfs(i);
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3420 KB Output is correct
2 Incorrect 1 ms 3164 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 3672 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 81 ms 16760 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 163 ms 24504 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 281 ms 41696 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 400 ms 51240 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 753 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 1020 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 1316 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 1522 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -