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Submission #125853

# Submission time Handle Problem Language Result Execution time Memory
125853 2019-07-06T13:08:01 Z wilwxk Pipes (CEOI15_pipes) C++14
10 / 100
 3085 ms 65540 KB 
#include <bits/stdc++.h>
using namespace std;

const int MAXN=1e5+5;
vector<int> g[MAXN];
int pre[MAXN], low[MAXN];
int n, m, tempo;

void dfs(int cur, int p) {
	pre[cur]=low[cur]=++tempo;
	for(auto viz : g[cur]) {
		if(viz==p) continue;
		if(!pre[viz]) {
			dfs(viz, cur);
			low[cur]=min(low[cur], low[viz]);
			if(low[viz]>pre[cur]) printf("%d %d\n", cur, viz);
		}
		low[cur]=min(low[cur], pre[viz]);
	}
	// printf("%d >> %d %d\n", cur, pre[cur], low[cur]);
}

int main() {
	scanf("%d %d", &n, &m);
	for(int i=1; i<=m; i++) {
		int a, b; scanf("%d %d", &a, &b);
		g[a].push_back(b); g[b].push_back(a);
	}

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

}

Compilation message

pipes.cpp: In function 'int main()':
pipes.cpp:24:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
pipes.cpp:26:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int a, b; scanf("%d %d", &a, &b);
             ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2680 KB Output is correct
2 Incorrect 4 ms 2652 KB Wrong number of edges

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 3168 KB Output is correct
2 Incorrect 8 ms 2936 KB Wrong number of edges

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 184 ms 10824 KB Output is correct
2 Correct 180 ms 10144 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 354 ms 14136 KB Output is correct
2 Runtime error 404 ms 18588 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 612 ms 24908 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 993 ms 30284 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 1599 ms 58124 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 2182 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 2967 ms 65540 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 3085 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -