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Submission #86672

# Submission time Handle Problem Language Result Execution time Memory
86672 2018-11-27T05:22:00 Z dimash241 Pipes (CEOI15_pipes) C++17
0 / 100
 735 ms 65536 KB 
# include <stdio.h>
# include <bits/stdc++.h>

#define Accepted 0
#define pb push_back
#define F first
#define S second
#define For(i,x,y)  for (int i = x; i <= y; i ++) 
#define FOr(i,x,y)  for (int i = x; i >= y; i --)
#define SpeedForce ios_base::sync_with_stdio(0), cin.tie(0)

using namespace std;
 
int n, m;
bitset < 100101 > g[100101];
vector < pair < int, int > > ans;

int tin[100101];
int fup[100101];
int timer;

inline void dfs (int v, int par = 0) {
	tin[v] = fup[v] = ++ timer;
	for (int i = g[v]._Find_first(); i < g[v].size(); i = g[v]._Find_next(i)) {
		if (i == par) continue;
		if (tin[i]) {
			fup[v] = min(fup[v], tin[i]);
		} else {
			dfs (i, v);
			fup[v] = min(fup[v], fup[i]);
			if (tin[v] < fup[i]) {
				ans.pb({v, i});
			}
		}
	}
}

int main () {               
    cin >> n >> m;
    For (i, 1, m) {
    	int l, r;
    	cin >> l >> r;
    	g[l][r] = 1;
    	g[r][l] = 1;
    }

    For (i, 1, n) {
    	if (!tin[i]) {
    		dfs (i);
    	}
    }

    for (auto it : ans)
    	cout << it.F << ' ' << it.S << '\n';
    return Accepted;
}

Compilation message

pipes.cpp: In function 'void dfs(int, int)':
pipes.cpp:24:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = g[v]._Find_first(); i < g[v].size(); i = g[v]._Find_next(i)) {
                                   ~~^~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 708 KB Output is correct
2 Incorrect 2 ms 612 KB Wrong number of edges

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 36 ms 20268 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 370 ms 16516 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 735 ms 50520 KB Memory limit exceeded (if you are sure your verdict is not MLE, please contact us)
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 59 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 60 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 63 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 71 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 58 ms 65536 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 58 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -