#include <bits/stdc++.h>
using namespace std;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
using ll = long long;
const int inf = 2e9;
int n, m, mx, nm;
vector<int> g[100100];
bool used[100100];
void dfs(int v, int p, int de)
{
used[v] = 1;
if (de >= mx) { mx = de; nm = v; }
for (auto u : g[v])
if (u != p) dfs(u, v, de + 1);
}
int diam(int v)
{
mx = 0;
dfs(v, -1, 0);
mx = 0;
dfs(nm, -1, 0);
return mx + 1;
}
int main()
{
ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin >> n >> m;
for (int i = 1; i <= m; i++)
{
int u, v;
cin >> u >> v;
g[u].push_back(v);
g[v].push_back(u);
}
int ans = 0;
for (int i = 1; i <= n; i++)
if (!used[i]) ans += diam(i);
cout << ans << '\n';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
3148 KB |
Output is correct |
2 |
Correct |
12 ms |
3664 KB |
Output is correct |
3 |
Correct |
17 ms |
4304 KB |
Output is correct |
4 |
Correct |
26 ms |
4820 KB |
Output is correct |
5 |
Correct |
32 ms |
5524 KB |
Output is correct |
6 |
Correct |
38 ms |
5984 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
28 ms |
10560 KB |
Output is correct |
2 |
Correct |
4 ms |
3020 KB |
Output is correct |
3 |
Correct |
6 ms |
3404 KB |
Output is correct |
4 |
Correct |
8 ms |
3892 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2636 KB |
Output is correct |
2 |
Correct |
2 ms |
2572 KB |
Output is correct |
3 |
Correct |
1 ms |
2636 KB |
Output is correct |
4 |
Correct |
1 ms |
2636 KB |
Output is correct |
5 |
Correct |
4 ms |
3148 KB |
Output is correct |
6 |
Correct |
7 ms |
3660 KB |
Output is correct |
7 |
Correct |
10 ms |
4192 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
2636 KB |
Output is correct |
2 |
Correct |
2 ms |
2636 KB |
Output is correct |
3 |
Correct |
1 ms |
2636 KB |
Output is correct |
4 |
Correct |
2 ms |
2636 KB |
Output is correct |
5 |
Correct |
2 ms |
2636 KB |
Output is correct |
6 |
Correct |
2 ms |
2636 KB |
Output is correct |
7 |
Correct |
1 ms |
2632 KB |
Output is correct |
8 |
Correct |
2 ms |
2636 KB |
Output is correct |
9 |
Correct |
3 ms |
2636 KB |
Output is correct |
10 |
Correct |
2 ms |
2636 KB |
Output is correct |
11 |
Correct |
1 ms |
2636 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
3148 KB |
Output is correct |
2 |
Correct |
12 ms |
3664 KB |
Output is correct |
3 |
Correct |
17 ms |
4304 KB |
Output is correct |
4 |
Correct |
26 ms |
4820 KB |
Output is correct |
5 |
Correct |
32 ms |
5524 KB |
Output is correct |
6 |
Correct |
38 ms |
5984 KB |
Output is correct |
7 |
Correct |
28 ms |
10560 KB |
Output is correct |
8 |
Correct |
4 ms |
3020 KB |
Output is correct |
9 |
Correct |
6 ms |
3404 KB |
Output is correct |
10 |
Correct |
8 ms |
3892 KB |
Output is correct |
11 |
Correct |
1 ms |
2636 KB |
Output is correct |
12 |
Correct |
2 ms |
2572 KB |
Output is correct |
13 |
Correct |
1 ms |
2636 KB |
Output is correct |
14 |
Correct |
1 ms |
2636 KB |
Output is correct |
15 |
Correct |
4 ms |
3148 KB |
Output is correct |
16 |
Correct |
7 ms |
3660 KB |
Output is correct |
17 |
Correct |
10 ms |
4192 KB |
Output is correct |
18 |
Correct |
2 ms |
2636 KB |
Output is correct |
19 |
Correct |
2 ms |
2636 KB |
Output is correct |
20 |
Correct |
1 ms |
2636 KB |
Output is correct |
21 |
Correct |
2 ms |
2636 KB |
Output is correct |
22 |
Correct |
2 ms |
2636 KB |
Output is correct |
23 |
Correct |
2 ms |
2636 KB |
Output is correct |
24 |
Correct |
1 ms |
2632 KB |
Output is correct |
25 |
Correct |
2 ms |
2636 KB |
Output is correct |
26 |
Correct |
3 ms |
2636 KB |
Output is correct |
27 |
Correct |
2 ms |
2636 KB |
Output is correct |
28 |
Correct |
1 ms |
2636 KB |
Output is correct |
29 |
Correct |
38 ms |
5976 KB |
Output is correct |
30 |
Correct |
8 ms |
3532 KB |
Output is correct |
31 |
Correct |
22 ms |
5836 KB |
Output is correct |
32 |
Correct |
13 ms |
4184 KB |
Output is correct |
33 |
Correct |
28 ms |
5924 KB |
Output is correct |
34 |
Correct |
18 ms |
4648 KB |
Output is correct |
35 |
Correct |
28 ms |
5800 KB |
Output is correct |
36 |
Correct |
25 ms |
5084 KB |
Output is correct |
37 |
Correct |
29 ms |
5872 KB |
Output is correct |
38 |
Correct |
32 ms |
5452 KB |
Output is correct |
39 |
Correct |
26 ms |
5836 KB |
Output is correct |