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Submission #1021646

# Submission time Handle Problem Language Result Execution time Memory
1021646 2024-07-13T01:13:00 Z idiotcomputer Pipes (CEOI15_pipes) C++11
20 / 100
 1148 ms 65536 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define sz size 

const int mxN = 1e5;
vector<int> adj[mxN];
int d[mxN];
int low[mxN];

void dfs(int c, int depth, int p){
	d[c] = depth;
	low[c] = d[c];
	int op = p;
	for (int i : adj[c]){
		if (i == p){p = -1; continue;}
		if (d[i] != -1){ low[c] = min(low[c],d[i]); continue;}
		dfs(i,depth+1,c);
		low[c] = min(low[c], low[i]);
	}
	if (low[c] >= depth && op != -1) cout << c+1 << " " << op+1 << '\n';
}

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

	int n,m;
	cin >> n >> m;
	int a,b;
	for (int i = 0; i < m; i++){
		cin >> a >> b;
		a -= 1;
		b -= 1;
		adj[a].pb(b);
		adj[b].pb(a);
	}
	for (int i = 0; i < n; i++) d[i] = -1;
	for (int i = 0; i < n; i++) if (d[i] == -1) dfs(i,0,-1);
	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2648 KB Output is correct
2 Correct 2 ms 2652 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3420 KB Output is correct
2 Correct 4 ms 2984 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 76 ms 16420 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 140 ms 23900 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 272 ms 41564 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 364 ms 52152 KB Memory limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 621 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 775 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 976 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 1148 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -