#include "race.h"
#include <bits/stdc++.h>
using namespace std;
#define pii pair<long long, long long>
long long n, k;
vector<pii> adjlist[200000];
long long dep[200000];
long long off[200000];
long long ans = 1<<30;
set<pii> *dfs(long long n, long long p, long long d){
dep[n] = d;
set<pii> *cur = new set<pii>();
for (auto [i, cost] : adjlist[n]){
if (i == p) continue;
set<pii> *child = dfs(i, n, d + 1);
if (cur->size() < child->size()){
for (auto [path, depth] : *cur){
auto itr = child->lower_bound({k - (path + off[n]) - cost - off[i], 0});
if (itr != child->end()){
if ((*itr).first == k - (path + off[n]) - cost - off[i]){
ans = min(ans, (*itr).second + depth - 2*d);
}
}
}
for (auto [path, depth] : *cur){
long long newp = path + off[n] - off[i] - cost;
child->insert({newp, depth});
}
off[n] = off[i] + cost;
swap(child, cur);
} else {
for (auto [path, depth] : *child){
long long actual = path + off[i] + cost;
auto itr = cur->lower_bound({k - actual - off[n], 0});
if (itr != cur->end()){
if ((*itr).first == k - actual - off[n]){
ans = min(ans, (*itr).second + depth - 2*d);
}
}
}
for (auto [path, depth] : *child){
cur->insert({path + off[i] + cost - off[n], depth});
}
}
}
cur->insert({-off[n], d});
auto itr = cur->lower_bound({k - off[n], 0});
if (itr != cur->end()){
if ((*itr).first == k - off[n]){
ans = min(ans, (*itr).second - d);
}
}
return cur;
}
int best_path(int N, int K, int H[][2], int L[]){
n = N;
k = K;
for (int i = 0; i < N - 1; i++){
adjlist[H[i][0]].push_back({H[i][1], L[i]});
adjlist[H[i][1]].push_back({H[i][0], L[i]});
}
dfs(0, -1, 0);
if (ans == (1<<30)) return -1;
else return ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 2 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 3 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 4 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 6 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 7 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 9 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 10 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 11 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 12 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 13 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 14 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 15 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 16 |
Correct |
4 ms |
5228 KB |
Output is correct |
| 17 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5100 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 2 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 3 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 4 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 6 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 7 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 9 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 10 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 11 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 12 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 13 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 14 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 15 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 16 |
Correct |
4 ms |
5228 KB |
Output is correct |
| 17 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 19 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 20 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 21 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 22 |
Correct |
5 ms |
5368 KB |
Output is correct |
| 23 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 24 |
Correct |
5 ms |
5376 KB |
Output is correct |
| 25 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 26 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 27 |
Correct |
5 ms |
5228 KB |
Output is correct |
| 28 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 29 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 30 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 31 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 32 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 33 |
Correct |
6 ms |
5484 KB |
Output is correct |
| 34 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 35 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 36 |
Correct |
4 ms |
5356 KB |
Output is correct |
| 37 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 38 |
Correct |
8 ms |
5356 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 2 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 3 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 4 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 6 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 7 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 9 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 10 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 11 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 12 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 13 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 14 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 15 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 16 |
Correct |
4 ms |
5228 KB |
Output is correct |
| 17 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 19 |
Correct |
149 ms |
36716 KB |
Output is correct |
| 20 |
Correct |
157 ms |
36588 KB |
Output is correct |
| 21 |
Correct |
155 ms |
36332 KB |
Output is correct |
| 22 |
Correct |
154 ms |
35292 KB |
Output is correct |
| 23 |
Correct |
171 ms |
50156 KB |
Output is correct |
| 24 |
Correct |
128 ms |
38636 KB |
Output is correct |
| 25 |
Correct |
131 ms |
40012 KB |
Output is correct |
| 26 |
Correct |
93 ms |
46976 KB |
Output is correct |
| 27 |
Correct |
248 ms |
52588 KB |
Output is correct |
| 28 |
Correct |
280 ms |
88812 KB |
Output is correct |
| 29 |
Correct |
272 ms |
86724 KB |
Output is correct |
| 30 |
Correct |
247 ms |
52588 KB |
Output is correct |
| 31 |
Correct |
249 ms |
52584 KB |
Output is correct |
| 32 |
Correct |
301 ms |
52836 KB |
Output is correct |
| 33 |
Correct |
245 ms |
48364 KB |
Output is correct |
| 34 |
Correct |
348 ms |
81132 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 2 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 3 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 4 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 5 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 6 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 7 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 9 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 10 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 11 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 12 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 13 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 14 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 15 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 16 |
Correct |
4 ms |
5228 KB |
Output is correct |
| 17 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 18 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 19 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 20 |
Correct |
4 ms |
5100 KB |
Output is correct |
| 21 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 22 |
Correct |
5 ms |
5368 KB |
Output is correct |
| 23 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 24 |
Correct |
5 ms |
5376 KB |
Output is correct |
| 25 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 26 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 27 |
Correct |
5 ms |
5228 KB |
Output is correct |
| 28 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 29 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 30 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 31 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 32 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 33 |
Correct |
6 ms |
5484 KB |
Output is correct |
| 34 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 35 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 36 |
Correct |
4 ms |
5356 KB |
Output is correct |
| 37 |
Correct |
5 ms |
5356 KB |
Output is correct |
| 38 |
Correct |
8 ms |
5356 KB |
Output is correct |
| 39 |
Correct |
149 ms |
36716 KB |
Output is correct |
| 40 |
Correct |
157 ms |
36588 KB |
Output is correct |
| 41 |
Correct |
155 ms |
36332 KB |
Output is correct |
| 42 |
Correct |
154 ms |
35292 KB |
Output is correct |
| 43 |
Correct |
171 ms |
50156 KB |
Output is correct |
| 44 |
Correct |
128 ms |
38636 KB |
Output is correct |
| 45 |
Correct |
131 ms |
40012 KB |
Output is correct |
| 46 |
Correct |
93 ms |
46976 KB |
Output is correct |
| 47 |
Correct |
248 ms |
52588 KB |
Output is correct |
| 48 |
Correct |
280 ms |
88812 KB |
Output is correct |
| 49 |
Correct |
272 ms |
86724 KB |
Output is correct |
| 50 |
Correct |
247 ms |
52588 KB |
Output is correct |
| 51 |
Correct |
249 ms |
52584 KB |
Output is correct |
| 52 |
Correct |
301 ms |
52836 KB |
Output is correct |
| 53 |
Correct |
245 ms |
48364 KB |
Output is correct |
| 54 |
Correct |
348 ms |
81132 KB |
Output is correct |
| 55 |
Correct |
17 ms |
8940 KB |
Output is correct |
| 56 |
Correct |
12 ms |
7660 KB |
Output is correct |
| 57 |
Correct |
84 ms |
31852 KB |
Output is correct |
| 58 |
Correct |
64 ms |
25436 KB |
Output is correct |
| 59 |
Correct |
87 ms |
46792 KB |
Output is correct |
| 60 |
Correct |
254 ms |
87148 KB |
Output is correct |
| 61 |
Correct |
302 ms |
58348 KB |
Output is correct |
| 62 |
Correct |
237 ms |
52716 KB |
Output is correct |
| 63 |
Correct |
303 ms |
52716 KB |
Output is correct |
| 64 |
Correct |
458 ms |
108976 KB |
Output is correct |
| 65 |
Correct |
457 ms |
101868 KB |
Output is correct |
| 66 |
Correct |
279 ms |
82028 KB |
Output is correct |
| 67 |
Correct |
210 ms |
48596 KB |
Output is correct |
| 68 |
Correct |
385 ms |
69656 KB |
Output is correct |
| 69 |
Correct |
420 ms |
75264 KB |
Output is correct |
| 70 |
Correct |
371 ms |
66644 KB |
Output is correct |
