#include<bits/stdc++.h>
using namespace std;
long long n, x, y, cnt, pos, check = 0, c[20001], t, mini = INT_MAX;
vector<int> vec[20001];
void dfs(int x, int p, int done)
{
if(x == done) return;
++cnt;
for(int c : vec[x]) if(c != p) dfs(c, x, done);
}
void dfs2(int x, int p, int done, int done2)
{
if(x == done)
{
return;
check = 1;
}
++cnt;
for(int c : vec[x])
{
if(x == done2) cnt = 0;
if(c != p) dfs2(c, x, done, done2);
if(check && x == done2) return;
}
}
int main()
{
cin >> n;
for(int i = 1; i < n; ++i)
{
cin >> x >> y;
vec[x].push_back(y);
vec[y].push_back(x);
}
for(int i = 1; i <= n; ++i)
{
for(int j = i + 1; j <= n; ++j)
{
cnt = 0;
dfs(i, 0, j);
long long temp = cnt;
cnt = 0;
dfs(j, 0, i);
long long temp2 = cnt;
cnt = 0;
dfs2(i, 0, j, i);
temp -= cnt;
temp2 -= cnt;
mini = min(mini, max(abs(temp - temp2), max(abs(temp - cnt), abs(temp2 - cnt))));
}
}
cout << mini;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
51 ms |
724 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
51 ms |
724 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
51 ms |
724 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |