Submission #1168642

#	Time	Username	Problem	Language	Result	Execution time	Memory
1168642		dombly	Pipes (CEOI15_pipes)	C++20	10 / 100	1083 ms	93288 KiB

pipes

#include <bits/stdc++.h>

using namespace std;

const int N = 1e5 + 10;

bool was[N];
int in[N], timer = 0, low[N];
vector<int> g[N];

void Dfs(int x, int p) {
  was[x] = true;
  low[x] = in[x] = ++timer;
  for(int j : g[x]) {
    if(j != p) {
      if(was[j]) low[x] = min(low[x], in[j]);
      else {
        Dfs(j, x);
        low[x] = min(low[x], low[j]);
        if(in[x] < low[j]) cout << x << " " << j << "\n";
      }
    }
  }
}

signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);

  int n, m;
  cin >> n >> m;
  for(int i = 1; i <= m; i++) {
    int u, v;
    cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u);
  }
  for(int i = 1; i <= n; i++) if(!was[i]) Dfs(i, 0);
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10