#include "race.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int N = 200200;
int ans = -1, d[N], K;
ll len[N];
vector<pair<int, int>> g[N];
void calc(int u,int p,ll x = 0) {
len[u] = x;
for(auto to : g[u]) if(to.first != p) {
d[to.first] = d[u] + 1;
calc(to.first, u, x + to.second);
}
}
map<ll, int> dfs(int u,int p) {
map<ll, int> own;
own[len[u]] = d[u];
for(auto to : g[u]) if(to.first != p) {
auto x = dfs(to.first, u);
if(x.size() > own.size()) {
own.swap(x);
}
for(auto it : x) {
if(own.count(K - it.first + 2 * len[u])) {
if(ans == -1) {
ans = own[K - it.first + 2 * len[u]] + it.second - 2 * d[u];
} else {
ans = min(ans, own[K - it.first + 2 * len[u]] + it.second - 2 * d[u]);
}
}
if(own.count(it.first)) {
own[it.first] = min(own[it.first], it.second);
} else {
own[it.first] = it.second;
}
}
}
return own;
}
int best_path(int n, int k, int h[][2], int l[]) {
K = k;
for(int i = 0; i < n - 1; i++) {
int u = h[i][0],v = h[i][1], w = l[i];
g[u].push_back({v, w});
g[v].push_back({u, w});
}
calc(0, -1);
dfs(0, -1);
return ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 6 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5048 KB |
Output is correct |
| 12 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
4 ms |
5052 KB |
Output is correct |
| 16 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4940 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 6 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5048 KB |
Output is correct |
| 12 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
4 ms |
5052 KB |
Output is correct |
| 16 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 20 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 22 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 23 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 24 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 25 |
Correct |
5 ms |
5156 KB |
Output is correct |
| 26 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 27 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 28 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 29 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 30 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 31 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 32 |
Correct |
4 ms |
5144 KB |
Output is correct |
| 33 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 34 |
Correct |
4 ms |
5196 KB |
Output is correct |
| 35 |
Correct |
4 ms |
5196 KB |
Output is correct |
| 36 |
Correct |
4 ms |
5196 KB |
Output is correct |
| 37 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 38 |
Correct |
4 ms |
5068 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 6 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5048 KB |
Output is correct |
| 12 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
4 ms |
5052 KB |
Output is correct |
| 16 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 19 |
Correct |
140 ms |
11128 KB |
Output is correct |
| 20 |
Correct |
131 ms |
11080 KB |
Output is correct |
| 21 |
Correct |
141 ms |
11000 KB |
Output is correct |
| 22 |
Correct |
143 ms |
11148 KB |
Output is correct |
| 23 |
Correct |
155 ms |
11448 KB |
Output is correct |
| 24 |
Correct |
122 ms |
11284 KB |
Output is correct |
| 25 |
Correct |
121 ms |
26440 KB |
Output is correct |
| 26 |
Correct |
77 ms |
40212 KB |
Output is correct |
| 27 |
Correct |
246 ms |
17584 KB |
Output is correct |
| 28 |
Correct |
349 ms |
75156 KB |
Output is correct |
| 29 |
Correct |
352 ms |
72676 KB |
Output is correct |
| 30 |
Correct |
269 ms |
17612 KB |
Output is correct |
| 31 |
Correct |
248 ms |
17552 KB |
Output is correct |
| 32 |
Correct |
346 ms |
17604 KB |
Output is correct |
| 33 |
Correct |
308 ms |
17208 KB |
Output is correct |
| 34 |
Correct |
420 ms |
29736 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 6 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
5048 KB |
Output is correct |
| 12 |
Correct |
5 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
4 ms |
5052 KB |
Output is correct |
| 16 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 20 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 22 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 23 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 24 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 25 |
Correct |
5 ms |
5156 KB |
Output is correct |
| 26 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 27 |
Correct |
4 ms |
5048 KB |
Output is correct |
| 28 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 29 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 30 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 31 |
Correct |
5 ms |
5068 KB |
Output is correct |
| 32 |
Correct |
4 ms |
5144 KB |
Output is correct |
| 33 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 34 |
Correct |
4 ms |
5196 KB |
Output is correct |
| 35 |
Correct |
4 ms |
5196 KB |
Output is correct |
| 36 |
Correct |
4 ms |
5196 KB |
Output is correct |
| 37 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 38 |
Correct |
4 ms |
5068 KB |
Output is correct |
| 39 |
Correct |
140 ms |
11128 KB |
Output is correct |
| 40 |
Correct |
131 ms |
11080 KB |
Output is correct |
| 41 |
Correct |
141 ms |
11000 KB |
Output is correct |
| 42 |
Correct |
143 ms |
11148 KB |
Output is correct |
| 43 |
Correct |
155 ms |
11448 KB |
Output is correct |
| 44 |
Correct |
122 ms |
11284 KB |
Output is correct |
| 45 |
Correct |
121 ms |
26440 KB |
Output is correct |
| 46 |
Correct |
77 ms |
40212 KB |
Output is correct |
| 47 |
Correct |
246 ms |
17584 KB |
Output is correct |
| 48 |
Correct |
349 ms |
75156 KB |
Output is correct |
| 49 |
Correct |
352 ms |
72676 KB |
Output is correct |
| 50 |
Correct |
269 ms |
17612 KB |
Output is correct |
| 51 |
Correct |
248 ms |
17552 KB |
Output is correct |
| 52 |
Correct |
346 ms |
17604 KB |
Output is correct |
| 53 |
Correct |
308 ms |
17208 KB |
Output is correct |
| 54 |
Correct |
420 ms |
29736 KB |
Output is correct |
| 55 |
Correct |
17 ms |
6076 KB |
Output is correct |
| 56 |
Correct |
10 ms |
5652 KB |
Output is correct |
| 57 |
Incorrect |
70 ms |
11236 KB |
Output isn't correct |
| 58 |
Halted |
0 ms |
0 KB |
- |
