#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
int K, ans = INT_MAX; vector<pair<int, int>> adj[200005]; set<pair<int, int>> S[200005];
void dfs(int i, int p, int dis, int dep){
S[i].insert({dis, dep});
for (auto nxt : adj[i]) if (nxt.f != p){
dfs(nxt.f, i, dis+nxt.s, dep+1);
if (S[i].size() < S[nxt.f].size()) swap(S[i], S[nxt.f]);
for (auto d : S[nxt.f]){
int other = K+2*dis-d.f; auto x = S[i].lower_bound({other, -1});
if (x != S[i].end() and (*x).f == other) ans = min(ans, d.s+(*x).s-2*dep);
}for (auto d : S[nxt.f]) S[i].insert(d);
}
}
int best_path(int n, int k, int h[][2], int l[]){
for (int i = 0; i < n-1; i++){
adj[h[i][0]].push_back({h[i][1], l[i]});
adj[h[i][1]].push_back({h[i][0], l[i]});
}K = k; dfs(0, 0, 0, 0); return (ans == INT_MAX) ? -1 : ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 2 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 3 |
Correct |
8 ms |
14388 KB |
Output is correct |
| 4 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 5 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 6 |
Correct |
10 ms |
14396 KB |
Output is correct |
| 7 |
Correct |
9 ms |
14392 KB |
Output is correct |
| 8 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 9 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 10 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 11 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 12 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 13 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 14 |
Correct |
8 ms |
14404 KB |
Output is correct |
| 15 |
Correct |
9 ms |
14332 KB |
Output is correct |
| 16 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 17 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14412 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 2 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 3 |
Correct |
8 ms |
14388 KB |
Output is correct |
| 4 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 5 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 6 |
Correct |
10 ms |
14396 KB |
Output is correct |
| 7 |
Correct |
9 ms |
14392 KB |
Output is correct |
| 8 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 9 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 10 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 11 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 12 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 13 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 14 |
Correct |
8 ms |
14404 KB |
Output is correct |
| 15 |
Correct |
9 ms |
14332 KB |
Output is correct |
| 16 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 17 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 19 |
Correct |
9 ms |
14404 KB |
Output is correct |
| 20 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 21 |
Correct |
11 ms |
14556 KB |
Output is correct |
| 22 |
Correct |
10 ms |
14656 KB |
Output is correct |
| 23 |
Correct |
11 ms |
14540 KB |
Output is correct |
| 24 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 25 |
Correct |
9 ms |
14528 KB |
Output is correct |
| 26 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 27 |
Correct |
9 ms |
14528 KB |
Output is correct |
| 28 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 29 |
Correct |
11 ms |
14532 KB |
Output is correct |
| 30 |
Correct |
11 ms |
14536 KB |
Output is correct |
| 31 |
Correct |
11 ms |
14528 KB |
Output is correct |
| 32 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 33 |
Correct |
9 ms |
14668 KB |
Output is correct |
| 34 |
Correct |
9 ms |
14540 KB |
Output is correct |
| 35 |
Correct |
9 ms |
14508 KB |
Output is correct |
| 36 |
Correct |
9 ms |
14540 KB |
Output is correct |
| 37 |
Correct |
9 ms |
14540 KB |
Output is correct |
| 38 |
Correct |
9 ms |
14568 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 2 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 3 |
Correct |
8 ms |
14388 KB |
Output is correct |
| 4 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 5 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 6 |
Correct |
10 ms |
14396 KB |
Output is correct |
| 7 |
Correct |
9 ms |
14392 KB |
Output is correct |
| 8 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 9 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 10 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 11 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 12 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 13 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 14 |
Correct |
8 ms |
14404 KB |
Output is correct |
| 15 |
Correct |
9 ms |
14332 KB |
Output is correct |
| 16 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 17 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 19 |
Correct |
152 ms |
35848 KB |
Output is correct |
| 20 |
Correct |
160 ms |
35852 KB |
Output is correct |
| 21 |
Correct |
155 ms |
35348 KB |
Output is correct |
| 22 |
Correct |
161 ms |
34268 KB |
Output is correct |
| 23 |
Correct |
192 ms |
45200 KB |
Output is correct |
| 24 |
Correct |
146 ms |
35196 KB |
Output is correct |
| 25 |
Correct |
137 ms |
39052 KB |
Output is correct |
| 26 |
Correct |
88 ms |
43520 KB |
Output is correct |
| 27 |
Correct |
235 ms |
43816 KB |
Output is correct |
| 28 |
Correct |
350 ms |
72884 KB |
Output is correct |
| 29 |
Correct |
285 ms |
71584 KB |
Output is correct |
| 30 |
Correct |
288 ms |
43848 KB |
Output is correct |
| 31 |
Correct |
241 ms |
43992 KB |
Output is correct |
| 32 |
Correct |
361 ms |
43892 KB |
Output is correct |
| 33 |
Correct |
247 ms |
44812 KB |
Output is correct |
| 34 |
Correct |
359 ms |
69812 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 2 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 3 |
Correct |
8 ms |
14388 KB |
Output is correct |
| 4 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 5 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 6 |
Correct |
10 ms |
14396 KB |
Output is correct |
| 7 |
Correct |
9 ms |
14392 KB |
Output is correct |
| 8 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 9 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 10 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 11 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 12 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 13 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 14 |
Correct |
8 ms |
14404 KB |
Output is correct |
| 15 |
Correct |
9 ms |
14332 KB |
Output is correct |
| 16 |
Correct |
8 ms |
14412 KB |
Output is correct |
| 17 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 19 |
Correct |
9 ms |
14404 KB |
Output is correct |
| 20 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 21 |
Correct |
11 ms |
14556 KB |
Output is correct |
| 22 |
Correct |
10 ms |
14656 KB |
Output is correct |
| 23 |
Correct |
11 ms |
14540 KB |
Output is correct |
| 24 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 25 |
Correct |
9 ms |
14528 KB |
Output is correct |
| 26 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 27 |
Correct |
9 ms |
14528 KB |
Output is correct |
| 28 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 29 |
Correct |
11 ms |
14532 KB |
Output is correct |
| 30 |
Correct |
11 ms |
14536 KB |
Output is correct |
| 31 |
Correct |
11 ms |
14528 KB |
Output is correct |
| 32 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 33 |
Correct |
9 ms |
14668 KB |
Output is correct |
| 34 |
Correct |
9 ms |
14540 KB |
Output is correct |
| 35 |
Correct |
9 ms |
14508 KB |
Output is correct |
| 36 |
Correct |
9 ms |
14540 KB |
Output is correct |
| 37 |
Correct |
9 ms |
14540 KB |
Output is correct |
| 38 |
Correct |
9 ms |
14568 KB |
Output is correct |
| 39 |
Correct |
152 ms |
35848 KB |
Output is correct |
| 40 |
Correct |
160 ms |
35852 KB |
Output is correct |
| 41 |
Correct |
155 ms |
35348 KB |
Output is correct |
| 42 |
Correct |
161 ms |
34268 KB |
Output is correct |
| 43 |
Correct |
192 ms |
45200 KB |
Output is correct |
| 44 |
Correct |
146 ms |
35196 KB |
Output is correct |
| 45 |
Correct |
137 ms |
39052 KB |
Output is correct |
| 46 |
Correct |
88 ms |
43520 KB |
Output is correct |
| 47 |
Correct |
235 ms |
43816 KB |
Output is correct |
| 48 |
Correct |
350 ms |
72884 KB |
Output is correct |
| 49 |
Correct |
285 ms |
71584 KB |
Output is correct |
| 50 |
Correct |
288 ms |
43848 KB |
Output is correct |
| 51 |
Correct |
241 ms |
43992 KB |
Output is correct |
| 52 |
Correct |
361 ms |
43892 KB |
Output is correct |
| 53 |
Correct |
247 ms |
44812 KB |
Output is correct |
| 54 |
Correct |
359 ms |
69812 KB |
Output is correct |
| 55 |
Correct |
22 ms |
16972 KB |
Output is correct |
| 56 |
Correct |
18 ms |
16156 KB |
Output is correct |
| 57 |
Correct |
92 ms |
31876 KB |
Output is correct |
| 58 |
Correct |
58 ms |
25172 KB |
Output is correct |
| 59 |
Correct |
87 ms |
43460 KB |
Output is correct |
| 60 |
Correct |
269 ms |
71876 KB |
Output is correct |
| 61 |
Correct |
271 ms |
48196 KB |
Output is correct |
| 62 |
Correct |
235 ms |
44032 KB |
Output is correct |
| 63 |
Correct |
302 ms |
43972 KB |
Output is correct |
| 64 |
Correct |
514 ms |
87956 KB |
Output is correct |
| 65 |
Correct |
500 ms |
81888 KB |
Output is correct |
| 66 |
Correct |
291 ms |
68644 KB |
Output is correct |
| 67 |
Correct |
192 ms |
37540 KB |
Output is correct |
| 68 |
Correct |
445 ms |
55748 KB |
Output is correct |
| 69 |
Correct |
427 ms |
59972 KB |
Output is correct |
| 70 |
Correct |
385 ms |
54056 KB |
Output is correct |
