#include <bits/stdc++.h>
using namespace std;
const int N = 2e5+5;
int x,k;
vector<int>v[N];
int dist[N][2];
bool vis[N][2];
pair<int,int>dfs(int i,bool f){
queue<int>q;
q.push(i);
vis[i][f]=1;
dist[i][f]=1;
int mx=0,pos=i;
while(q.size()){
int j=q.front();q.pop();
if(mx<dist[j][f]){
mx=dist[j][f];
pos=j;
}
for(auto c:v[j]){
if(vis[c][f])continue;
vis[c][f]=1;
dist[c][f]=dist[j][f]+1;
q.push(c);
}
}
return {pos,mx};
}
int main(){
ios::sync_with_stdio(0);cin.tie(0);
cin>>x>>k;
for(int i=0;i<k;i++){
int l,r;cin>>l>>r;
v[l].push_back(r);
v[r].push_back(l);
}
int ans=0;
for(int i=1;i<=x;i++){
if(vis[i][0])continue;
int c=dfs(i,0).first;
ans+=dfs(c,1).second;
}
cout<<ans;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
10 ms |
5844 KB |
Output is correct |
2 |
Correct |
15 ms |
6832 KB |
Output is correct |
3 |
Correct |
23 ms |
7600 KB |
Output is correct |
4 |
Correct |
30 ms |
8532 KB |
Output is correct |
5 |
Correct |
40 ms |
9544 KB |
Output is correct |
6 |
Correct |
52 ms |
10324 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
31 ms |
10188 KB |
Output is correct |
2 |
Correct |
6 ms |
5676 KB |
Output is correct |
3 |
Correct |
10 ms |
6316 KB |
Output is correct |
4 |
Correct |
14 ms |
6868 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4948 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
5028 KB |
Output is correct |
5 |
Correct |
6 ms |
5844 KB |
Output is correct |
6 |
Correct |
9 ms |
6708 KB |
Output is correct |
7 |
Correct |
13 ms |
7508 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
5076 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
5024 KB |
Output is correct |
4 |
Correct |
3 ms |
4948 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
4 ms |
4948 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
5 ms |
5032 KB |
Output is correct |
9 |
Correct |
3 ms |
4948 KB |
Output is correct |
10 |
Correct |
3 ms |
5032 KB |
Output is correct |
11 |
Correct |
4 ms |
4948 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
10 ms |
5844 KB |
Output is correct |
2 |
Correct |
15 ms |
6832 KB |
Output is correct |
3 |
Correct |
23 ms |
7600 KB |
Output is correct |
4 |
Correct |
30 ms |
8532 KB |
Output is correct |
5 |
Correct |
40 ms |
9544 KB |
Output is correct |
6 |
Correct |
52 ms |
10324 KB |
Output is correct |
7 |
Correct |
31 ms |
10188 KB |
Output is correct |
8 |
Correct |
6 ms |
5676 KB |
Output is correct |
9 |
Correct |
10 ms |
6316 KB |
Output is correct |
10 |
Correct |
14 ms |
6868 KB |
Output is correct |
11 |
Correct |
3 ms |
4948 KB |
Output is correct |
12 |
Correct |
3 ms |
4948 KB |
Output is correct |
13 |
Correct |
3 ms |
4948 KB |
Output is correct |
14 |
Correct |
3 ms |
5028 KB |
Output is correct |
15 |
Correct |
6 ms |
5844 KB |
Output is correct |
16 |
Correct |
9 ms |
6708 KB |
Output is correct |
17 |
Correct |
13 ms |
7508 KB |
Output is correct |
18 |
Correct |
3 ms |
5076 KB |
Output is correct |
19 |
Correct |
3 ms |
4948 KB |
Output is correct |
20 |
Correct |
3 ms |
5024 KB |
Output is correct |
21 |
Correct |
3 ms |
4948 KB |
Output is correct |
22 |
Correct |
3 ms |
4948 KB |
Output is correct |
23 |
Correct |
4 ms |
4948 KB |
Output is correct |
24 |
Correct |
3 ms |
4948 KB |
Output is correct |
25 |
Correct |
5 ms |
5032 KB |
Output is correct |
26 |
Correct |
3 ms |
4948 KB |
Output is correct |
27 |
Correct |
3 ms |
5032 KB |
Output is correct |
28 |
Correct |
4 ms |
4948 KB |
Output is correct |
29 |
Correct |
59 ms |
10428 KB |
Output is correct |
30 |
Correct |
26 ms |
6964 KB |
Output is correct |
31 |
Correct |
35 ms |
9772 KB |
Output is correct |
32 |
Correct |
29 ms |
7852 KB |
Output is correct |
33 |
Correct |
40 ms |
10144 KB |
Output is correct |
34 |
Correct |
34 ms |
8448 KB |
Output is correct |
35 |
Correct |
36 ms |
9960 KB |
Output is correct |
36 |
Correct |
39 ms |
9044 KB |
Output is correct |
37 |
Correct |
51 ms |
10136 KB |
Output is correct |
38 |
Correct |
70 ms |
9624 KB |
Output is correct |
39 |
Correct |
36 ms |
9956 KB |
Output is correct |