#include "towns.h"
#include <bits/stdc++.h>
using namespace std;
int dd[200][200], d1[200], d2[200];
int GetDistance(int u, int v){
if (u==v) return 0;
if (dd[u][v]) return dd[u][v];
return dd[u][v]=dd[v][u]=getDistance(u, v);
}
int hubDistance(int N, int sub) {
int u=0, dis=0;
for (int i=1; i<N; ++i){
int d=GetDistance(0, i);
if (d>dis){
dis=d;
u=i;
}
}
dis=0;
int v=u;
for (int i=0; i<N; ++i) if (i!=u){
int d=GetDistance(u, i);
d1[i]=d;
if (d>dis){
dis=d;
v=i;
}
}
int ans=1e9;
vector<pair<int, int>> vv;
for (int i=0; i<N; ++i) if (i!=u && i!=v){
d2[i]=GetDistance(v, i);
int common=(d1[i]+d2[i]-dis)/2;
int dl=d1[i]-common, dr=d2[i]-common;
ans=min(ans, max(dl, dr));
vv.emplace_back(dl, dr);
}
d1[u]=d2[v]=0;
d1[v]=d2[u]=dis;
sort(vv.begin(), vv.end());
vv.resize(unique(vv.begin(), vv.end())-vv.begin());
for (auto &ii:vv) if (max(ii.first, ii.second)==ans){
int szl=0, szr=0;
vector<int> child;
for (int i=0; i<N; ++i){
int common=(d1[i]+d2[i]-dis)/2;
int dl=d1[i]-common, dr=d2[i]-common;
if (dl<ii.first) ++szl;
else if (dl>ii.first) ++szr;
else child.push_back(i);
}
// vector<pair<int, int>> subtree;
// for (int i:child){
// bool check=0;
// for (auto &j:subtree){
// int ff=GetDistance(i, j.first);
// int common=d1[i]+d1[j.first]-ff-ii.first*2;
// if (common){
// ++j.second;
// check=1;
// break;
// }
// }
// if (!check) subtree.emplace_back(i, 1);
// }
int mx=N/2;
bool check=szl<=mx && szr<=mx && (int)child.size()<=mx;
// for (auto &i:subtree) check&=i.second<=mx;
if (check) return ans;
}
return -ans;
}
Compilation message
towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:52:31: warning: unused variable 'dr' [-Wunused-variable]
52 | int dl=d1[i]-common, dr=d2[i]-common;
| ^~
towns.cpp:15:28: warning: unused parameter 'sub' [-Wunused-parameter]
15 | int hubDistance(int N, int sub) {
| ~~~~^~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
9 ms |
344 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
8 ms |
348 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
7 ms |
348 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
9 ms |
544 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
8 ms |
348 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
7 ms |
344 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |