#include<stdio.h>
#include<algorithm>
#include<vector>
using namespace std;
vector<int>E[100010];
int n, num[100001], cnt, par[100010], res;
bool chk[100010];
void DFS(int a){
num[a] = ++cnt;
int i, x, c = 0;
for (i = 0; i < E[a].size(); i++){
if (num[E[a][i]]){
if (E[a][i] != par[a] && num[E[a][i]] < num[a]){
x = a;
while (x != E[a][i]){
chk[x] = true;
x = par[x];
}
}
continue;
}
par[E[a][i]] = a;
DFS(E[a][i]);
if (!chk[E[a][i]])c++;
}
res += c / 2;
if (c % 2 == 1 && !chk[a]){
chk[a] = true;
res++;
}
}
int main()
{
int i, m, a, b;
scanf("%d%d", &n, &m);
while (m--){
scanf("%d%d", &a, &b);
E[a].push_back(b);
E[b].push_back(a);
}
chk[1] = true;
DFS(1);
printf("%d\n", res);
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 2 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 3 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 4 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 5 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 6 |
Correct |
4 ms |
4560 KB |
Output is correct |
| 7 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 8 |
Correct |
56 ms |
7596 KB |
Output is correct |
| 9 |
Correct |
64 ms |
7596 KB |
Output is correct |
| 10 |
Correct |
32 ms |
6012 KB |
Output is correct |
| 11 |
Correct |
60 ms |
7332 KB |
Output is correct |
| 12 |
Correct |
56 ms |
7596 KB |
Output is correct |
| 13 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 14 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 15 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 16 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 17 |
Correct |
36 ms |
7716 KB |
Output is correct |
| 18 |
Correct |
24 ms |
7980 KB |
Output is correct |
| 19 |
Correct |
40 ms |
7980 KB |
Output is correct |
| 20 |
Correct |
20 ms |
6140 KB |
Output is correct |
| 21 |
Correct |
40 ms |
7716 KB |
Output is correct |
| 22 |
Correct |
44 ms |
7980 KB |
Output is correct |
| 23 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 24 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 25 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 26 |
Correct |
0 ms |
4704 KB |
Output is correct |
| 27 |
Correct |
4 ms |
4736 KB |
Output is correct |
| 28 |
Correct |
64 ms |
11072 KB |
Output is correct |
| 29 |
Correct |
56 ms |
11476 KB |
Output is correct |
| 30 |
Correct |
36 ms |
7148 KB |
Output is correct |
| 31 |
Correct |
76 ms |
11660 KB |
Output is correct |
| 32 |
Correct |
68 ms |
12908 KB |
Output is correct |
| 33 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 34 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 35 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 36 |
Correct |
0 ms |
4692 KB |
Output is correct |
| 37 |
Correct |
36 ms |
7492 KB |
Output is correct |
| 38 |
Correct |
44 ms |
8196 KB |
Output is correct |
| 39 |
Correct |
40 ms |
8188 KB |
Output is correct |
| 40 |
Correct |
16 ms |
6308 KB |
Output is correct |
| 41 |
Correct |
40 ms |
7804 KB |
Output is correct |
| 42 |
Correct |
48 ms |
8172 KB |
Output is correct |
| 43 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 44 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 45 |
Correct |
0 ms |
4428 KB |
Output is correct |
| 46 |
Correct |
4 ms |
4560 KB |
Output is correct |
| 47 |
Correct |
8 ms |
5012 KB |
Output is correct |
| 48 |
Correct |
68 ms |
7956 KB |
Output is correct |
| 49 |
Correct |
72 ms |
8232 KB |
Output is correct |
| 50 |
Correct |
36 ms |
6168 KB |
Output is correct |
| 51 |
Correct |
52 ms |
8064 KB |
Output is correct |
| 52 |
Correct |
60 ms |
8372 KB |
Output is correct |
