#include <bits/stdc++.h>
#include "dreaming.h"
using namespace std;
const int N = 100'000 + 10;
vector<pair<int, int>> ad[N];
int f[N], trace[N];
bool mk[N];
vector<int> node;
void dfs(int u, int p = -1) {
mk[u] = true;
node.push_back(u);
trace[u] = p;
for (const auto& [v, w] : ad[u]) {
if (v == p) continue;
f[v] = f[u] + w;
dfs(v, u);
}
}
pair<int, int> findMid(int u) {
int v = u;
for (int t = 0; t < 2; ++t) {
for (const auto& x : node) f[x] = 0;
node.clear();
dfs(u);
for (const auto& x : node) if (f[v] < f[x]) v = x;
u = v;
}
int ret = v;
while (v != -1) {
if (max(f[v], f[u] - f[v]) < max(f[ret], f[u] - f[ret])) ret = v;
v = trace[v];
}
return {max(f[ret], f[u] - f[ret]), ret};
}
int travelTime(int n, int m, int l, int A[],int B[],int T[]) {
for (int i = 1; i <= m; ++i) {
int u = A[i], v = B[i], w = T[i];
ad[u].push_back({v, w});
ad[v].push_back({u, w});
}
vector<pair<int, int>> mid;
for (int i = 0; i < n; ++i) {
if (mk[i]) continue;
mid.push_back(findMid(i));
}
sort(mid.begin(), mid.end(), greater<>());
memset(trace, -1, sizeof trace);
for (const auto& x : mid) {
if (x == mid[0]) continue;
int u = mid[0].second, v = x.second;
ad[u].push_back({v, l});
ad[v].push_back({u, l});
}
memset(f, 0, sizeof f);
memset(trace, -1, sizeof trace);
findMid(0);
return *max_element(f, f + n);
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1047 ms |
15060 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1042 ms |
4440 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1047 ms |
15060 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1028 ms |
6488 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1042 ms |
4440 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1047 ms |
15060 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |