#include "citymapping.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int nx=1e3+5;
int rt, used[nx], sz[nx], u;
map<pair<int, int>, ll> mp;
vector<int> d[nx];
int dfssz(int u)
{
//cout<<"dfs "<<u<<'\n';
sz[u]=1;
for (auto v:d[u]) if (!used[v]) sz[u]+=dfssz(v);
return sz[u];
}
int findcentroid(int u, int rtsz)
{
for (auto v:d[u]) if (!used[v]&&(2*sz[v]+2)>=rtsz) return findcentroid(v, rtsz);
return u;
}
ll query(int u, int v)
{
if (u>v) swap(u, v);
if (mp.find({u, v})!=mp.end()) return mp[{u, v}];
return mp[{u, v}]=get_distance(u, v);
}
void find_roads(int N, int Q, int A[], int B[], int W[]) {
for (int i=2; i<=N; i++)
{
rt=1;
for (int j=1; j<=i; j++) used[j]=0;
while (dfssz(rt)!=1)
{
//printf("debug %d %d %d\n", i, rt, dfssz(rt));
u=findcentroid(rt, sz[rt]);
if (query(u, i)+query(1, u)==query(1, i)) rt=u;
else used[u]=1;
}
A[i-2]=i;
B[i-2]=rt;
d[rt].push_back(i);
//cout<<"edge "<<i<<' '<<rt<<'\n';
W[i-2]=query(rt, i);
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
2041 ms |
600 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
2041 ms |
600 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
2029 ms |
600 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
2029 ms |
600 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
2041 ms |
600 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |