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Submission #527250

# Submission time Handle Problem Language Result Execution time Memory
527250 2022-02-17T04:15:33 Z siewjh Pipes (CEOI15_pipes) C++17
30 / 100
 210 ms 16580 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <climits>
using namespace std;
const int MAXN = 10'005;
vector<int> adjlist[MAXN];
int tvis[MAXN], lo[MAXN];
int cnt = 0;
vector<pair<int, int>> ans;
void dfs(int x, int par) {
	tvis[x] = lo[x] = cnt++;
	bool vpar = 0;
	for (auto nxt : adjlist[x]) {
		if (nxt == par && !vpar) {
			vpar = 1;
			continue;
		}
		if (tvis[nxt] != INT_MAX) lo[x] = min(lo[x], tvis[nxt]);
		else {
			dfs(nxt, x);
			lo[x] = min(lo[x], lo[nxt]);
			if (lo[nxt] > tvis[x]) ans.push_back({ nxt, x });
		}
	}
}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	int nodes, edges; cin >> nodes >> edges;
	for (int i = 0; i < edges; i++) {
		int a, b; cin >> a >> b;
		adjlist[a].push_back(b);
		adjlist[b].push_back(a);
	}
	for (int i = 1; i <= nodes; i++) tvis[i] = INT_MAX;
	for (int i = 1; i <= nodes; i++)
		if (tvis[i] == INT_MAX)
			dfs(i, -1);
	for (auto x : ans) cout << x.first << ' ' << x.second << '\n';
	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 1 ms 460 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1100 KB Output is correct
2 Correct 3 ms 844 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 8772 KB Output is correct
2 Correct 94 ms 8096 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 181 ms 12328 KB Output is correct
2 Runtime error 210 ms 16580 KB Memory limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 844 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 844 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 844 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 844 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 844 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 844 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -