#include <bits/stdc++.h>
#include "race.h"
#define int64 long long
using namespace std;
const int maxn = 2e5 + 2;
vector <pair <int, int> > ad[maxn];
map <int, int> mp [maxn];
int rs = 1e9;
void dfs (int u, int p, int k, int d, int h) {
// cerr << u << " " << p << " " << k << " " << d << " " << h << "\n";
mp[u][d] = h;
for (auto [v, c]: ad[u]) {
if (v == p) continue;
dfs(v, u, k, d + c, h + 1);
if (mp[v].size() > mp[u].size()) swap(mp[u], mp[v]);
for (auto [cost, node]: mp[v]) {
int rem = k + 2 * d - cost;
if (mp[u].count(rem)) {
// cout << u << " " << cost << " " << rem << "\n";
rs = min(rs, mp[u][rem] + node - 2 * h);
}
}
for (auto [cost, node]: mp[v]) {
if (!mp[u].count(cost)) mp[u][cost] = node;
mp[u][cost] = min(mp[u][cost], node);
}
}
// if (mp[u].count(k + d)) rs = min(rs, mp[u][k + d] - h);
}
int best_path(int n, int k, int h[][2], int l[]){
for (int i = 0; i < n - 1; i++){
ad[h[i][0]].push_back({h[i][1], l[i]});
ad[h[i][1]].push_back({h[i][0], l[i]});
}
dfs(0, -1, k, 0, 0);
return rs == (int) 1e9 ? -1 : rs;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 2 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 3 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 4 |
Correct |
6 ms |
18012 KB |
Output is correct |
| 5 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 6 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 7 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 8 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 9 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 10 |
Correct |
4 ms |
18008 KB |
Output is correct |
| 11 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 12 |
Correct |
4 ms |
18008 KB |
Output is correct |
| 13 |
Correct |
4 ms |
18104 KB |
Output is correct |
| 14 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 15 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 16 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 17 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 18 |
Correct |
4 ms |
18012 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 2 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 3 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 4 |
Correct |
6 ms |
18012 KB |
Output is correct |
| 5 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 6 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 7 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 8 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 9 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 10 |
Correct |
4 ms |
18008 KB |
Output is correct |
| 11 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 12 |
Correct |
4 ms |
18008 KB |
Output is correct |
| 13 |
Correct |
4 ms |
18104 KB |
Output is correct |
| 14 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 15 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 16 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 17 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 18 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 19 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 20 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 21 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 22 |
Correct |
5 ms |
18352 KB |
Output is correct |
| 23 |
Correct |
5 ms |
18264 KB |
Output is correct |
| 24 |
Correct |
5 ms |
18264 KB |
Output is correct |
| 25 |
Correct |
6 ms |
18392 KB |
Output is correct |
| 26 |
Correct |
5 ms |
18264 KB |
Output is correct |
| 27 |
Correct |
5 ms |
18264 KB |
Output is correct |
| 28 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 29 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 30 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 31 |
Correct |
5 ms |
18180 KB |
Output is correct |
| 32 |
Correct |
5 ms |
18364 KB |
Output is correct |
| 33 |
Correct |
6 ms |
18268 KB |
Output is correct |
| 34 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 35 |
Correct |
5 ms |
18464 KB |
Output is correct |
| 36 |
Correct |
4 ms |
18156 KB |
Output is correct |
| 37 |
Correct |
4 ms |
18264 KB |
Output is correct |
| 38 |
Correct |
5 ms |
18268 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 2 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 3 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 4 |
Correct |
6 ms |
18012 KB |
Output is correct |
| 5 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 6 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 7 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 8 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 9 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 10 |
Correct |
4 ms |
18008 KB |
Output is correct |
| 11 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 12 |
Correct |
4 ms |
18008 KB |
Output is correct |
| 13 |
Correct |
4 ms |
18104 KB |
Output is correct |
| 14 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 15 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 16 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 17 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 18 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 19 |
Correct |
90 ms |
35668 KB |
Output is correct |
| 20 |
Correct |
92 ms |
36692 KB |
Output is correct |
| 21 |
Correct |
103 ms |
36144 KB |
Output is correct |
| 22 |
Correct |
96 ms |
36532 KB |
Output is correct |
| 23 |
Correct |
137 ms |
46172 KB |
Output is correct |
| 24 |
Correct |
106 ms |
38996 KB |
Output is correct |
| 25 |
Correct |
70 ms |
37968 KB |
Output is correct |
| 26 |
Correct |
47 ms |
44436 KB |
Output is correct |
| 27 |
Correct |
141 ms |
43860 KB |
Output is correct |
| 28 |
Correct |
248 ms |
78164 KB |
Output is correct |
| 29 |
Correct |
231 ms |
76884 KB |
Output is correct |
| 30 |
Correct |
187 ms |
44432 KB |
Output is correct |
| 31 |
Correct |
140 ms |
44372 KB |
Output is correct |
| 32 |
Correct |
211 ms |
44372 KB |
Output is correct |
| 33 |
Correct |
179 ms |
47952 KB |
Output is correct |
| 34 |
Correct |
320 ms |
72496 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 2 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 3 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 4 |
Correct |
6 ms |
18012 KB |
Output is correct |
| 5 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 6 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 7 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 8 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 9 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 10 |
Correct |
4 ms |
18008 KB |
Output is correct |
| 11 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 12 |
Correct |
4 ms |
18008 KB |
Output is correct |
| 13 |
Correct |
4 ms |
18104 KB |
Output is correct |
| 14 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 15 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 16 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 17 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 18 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 19 |
Correct |
4 ms |
18012 KB |
Output is correct |
| 20 |
Correct |
5 ms |
18012 KB |
Output is correct |
| 21 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 22 |
Correct |
5 ms |
18352 KB |
Output is correct |
| 23 |
Correct |
5 ms |
18264 KB |
Output is correct |
| 24 |
Correct |
5 ms |
18264 KB |
Output is correct |
| 25 |
Correct |
6 ms |
18392 KB |
Output is correct |
| 26 |
Correct |
5 ms |
18264 KB |
Output is correct |
| 27 |
Correct |
5 ms |
18264 KB |
Output is correct |
| 28 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 29 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 30 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 31 |
Correct |
5 ms |
18180 KB |
Output is correct |
| 32 |
Correct |
5 ms |
18364 KB |
Output is correct |
| 33 |
Correct |
6 ms |
18268 KB |
Output is correct |
| 34 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 35 |
Correct |
5 ms |
18464 KB |
Output is correct |
| 36 |
Correct |
4 ms |
18156 KB |
Output is correct |
| 37 |
Correct |
4 ms |
18264 KB |
Output is correct |
| 38 |
Correct |
5 ms |
18268 KB |
Output is correct |
| 39 |
Correct |
90 ms |
35668 KB |
Output is correct |
| 40 |
Correct |
92 ms |
36692 KB |
Output is correct |
| 41 |
Correct |
103 ms |
36144 KB |
Output is correct |
| 42 |
Correct |
96 ms |
36532 KB |
Output is correct |
| 43 |
Correct |
137 ms |
46172 KB |
Output is correct |
| 44 |
Correct |
106 ms |
38996 KB |
Output is correct |
| 45 |
Correct |
70 ms |
37968 KB |
Output is correct |
| 46 |
Correct |
47 ms |
44436 KB |
Output is correct |
| 47 |
Correct |
141 ms |
43860 KB |
Output is correct |
| 48 |
Correct |
248 ms |
78164 KB |
Output is correct |
| 49 |
Correct |
231 ms |
76884 KB |
Output is correct |
| 50 |
Correct |
187 ms |
44432 KB |
Output is correct |
| 51 |
Correct |
140 ms |
44372 KB |
Output is correct |
| 52 |
Correct |
211 ms |
44372 KB |
Output is correct |
| 53 |
Correct |
179 ms |
47952 KB |
Output is correct |
| 54 |
Correct |
320 ms |
72496 KB |
Output is correct |
| 55 |
Correct |
16 ms |
20576 KB |
Output is correct |
| 56 |
Correct |
9 ms |
19288 KB |
Output is correct |
| 57 |
Correct |
54 ms |
33876 KB |
Output is correct |
| 58 |
Correct |
39 ms |
29892 KB |
Output is correct |
| 59 |
Correct |
82 ms |
49324 KB |
Output is correct |
| 60 |
Correct |
239 ms |
77392 KB |
Output is correct |
| 61 |
Correct |
187 ms |
46164 KB |
Output is correct |
| 62 |
Correct |
138 ms |
44372 KB |
Output is correct |
| 63 |
Correct |
198 ms |
44372 KB |
Output is correct |
| 64 |
Correct |
427 ms |
84048 KB |
Output is correct |
| 65 |
Correct |
416 ms |
84704 KB |
Output is correct |
| 66 |
Correct |
250 ms |
71464 KB |
Output is correct |
| 67 |
Correct |
134 ms |
41448 KB |
Output is correct |
| 68 |
Correct |
299 ms |
56960 KB |
Output is correct |
| 69 |
Correct |
334 ms |
58440 KB |
Output is correct |
| 70 |
Correct |
285 ms |
55808 KB |
Output is correct |
