#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define sort undefined_function // To use stable_sort instead sort
#define bpc __builtin_popcount
#define ull unsigned long long
#define ld double
#define ll long long
#define mp make_pair
#define F first
#define S second
using namespace std;
#define short unsigned short
vector<short> tin, low;
vector<vector<short>> g;
short timer = 0;
void dfs(short x, short prt = 0) {
tin[x] = low[x] = ++timer;
bool ok = 0;
for (auto &y : g[x]) {
if (y == prt && !ok) {
ok = 1;
continue;
}
if (tin[y] == 0) {
dfs(y, x);
low[x] = min(low[x], low[y]);
} else {
low[x] = min(low[x], tin[y]);
}
if (low[y] > tin[x])
cout << x << " " << y << "\n";
}
}
int32_t main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
int n, m;
cin >> n >> m;
g.resize(n + 1);
tin.resize(n + 1);
low.resize(n + 1);
for (int i = 1; i <= m; i ++) {
int a, b;
cin >> a >> b;
g[a].push_back(b);
g[b].push_back(a);
}
for (int i = 1; i <= n; i ++) {
if (tin[i] == 0)
dfs(i);
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
856 KB |
Output is correct |
2 |
Correct |
2 ms |
604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
58 ms |
4692 KB |
Output is correct |
2 |
Correct |
54 ms |
4176 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
101 ms |
6660 KB |
Output is correct |
2 |
Correct |
114 ms |
8788 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
195 ms |
13324 KB |
Output is correct |
2 |
Correct |
143 ms |
11424 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
233 ms |
19028 KB |
Memory limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
442 ms |
31660 KB |
Memory limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
563 ms |
65536 KB |
Memory limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
698 ms |
65536 KB |
Memory limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
880 ms |
65536 KB |
Memory limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |