#include<bits/stdc++.h>
using namespace std ;
#include "race.h"
const int inf = 1e9 + 5 ;
const int maxn = 2e5 + 5 ;
const int MAXN = 1e6 + 5 ;
int sz[maxn], mark[maxn], ans, n, k, f[MAXN] ;
vector<pair<int,int>> grafo[maxn] ;
void dfs(int v, int p){
sz[v] = 1 ;
for(auto a : grafo[v]){
if(a.first == p || mark[a.first]) continue ;
dfs(a.first, v) ;
sz[v] += sz[a.first] ;
}
}
int find_cent(int v, int p, int szz){
for(auto a : grafo[v]){
if(a.first == p || mark[a.first] || 2*sz[a.first] <= szz) continue ;
return find_cent(a.first, v, szz) ;
}
return v ;
}
void make_count(int type, int v, int p, int dist, int lvl){
if(dist > k) return ;
if(type == -1) f[dist] = inf ;
else f[dist] = min(f[dist], lvl) ;
for(auto a : grafo[v]){
if(a.first == p || mark[a.first]) continue ;
make_count(type, a.first, v, dist + a.second, lvl + 1) ;
}
}
void add(int v, int p, int dist, int lvl){
if(dist > k) return ;
ans = min(ans, f[k-dist] + lvl) ;
for(auto a : grafo[v]){
if(a.first == p || mark[a.first]) continue ;
add(a.first, v, dist + a.second, lvl+1) ;
}
}
void make_graph(int v, int p){
dfs(v, p) ;
int c = find_cent(v, p, sz[v]) ;
mark[c] = 1 ;
f[0] = 0 ;
for(auto a : grafo[c]){
if(a.first == p || mark[a.first]) continue ;
add(a.first, c, a.second, 1) ;
make_count(0, a.first, c, a.second, 1) ;
}
for(auto a : grafo[c]){
if(a.first == p || mark[a.first]) continue ;
make_count(-1, a.first, c, a.second, 1) ;
}
for(auto a : grafo[c]){
if(a.first == p || mark[a.first]) continue ;
make_graph(a.first, c) ;
}
}
int best_path(int N, int K, int H[maxn][2], int L[maxn]) {
for(int i = 0 ; i < N - 1 ; i++){
grafo[H[i][0]].push_back({H[i][1], L[i]}) ; grafo[H[i][1]].push_back({H[i][0], L[i]}) ;
}
k = K ;
for(int i = 1 ; i <= K ; i++) f[i] = inf ;
ans = inf ;
make_graph(0, -1) ;
return (ans == inf ? -1 : ans) ;
}
// int32_t main(){
// ans = inf ;
// cin >> n >> k ;
// for(int i = 0 ; i < n-1 ; i++){
// int a, b, c ;
// cin >> a >> b >> c ;
// grafo[a].push_back({b, c}), grafo[b].push_back({a, c}) ;
// }
// for(int i = 1 ; i <= k ; i++) f[i] = inf ;
// make_graph(0, -1) ;
// cout << ans << "\n" ;
// }
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 2 |
Correct |
2 ms |
5000 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 16 |
Correct |
3 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 |
5036 KB |
Output is correct |
| 2 |
Correct |
2 ms |
5000 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 16 |
Correct |
3 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 |
2 ms |
4956 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
3 ms |
5068 KB |
Output is correct |
| 22 |
Correct |
4 ms |
8652 KB |
Output is correct |
| 23 |
Correct |
5 ms |
7968 KB |
Output is correct |
| 24 |
Correct |
5 ms |
8336 KB |
Output is correct |
| 25 |
Correct |
5 ms |
8268 KB |
Output is correct |
| 26 |
Correct |
5 ms |
6348 KB |
Output is correct |
| 27 |
Correct |
5 ms |
8140 KB |
Output is correct |
| 28 |
Correct |
4 ms |
5836 KB |
Output is correct |
| 29 |
Correct |
4 ms |
6348 KB |
Output is correct |
| 30 |
Correct |
4 ms |
6476 KB |
Output is correct |
| 31 |
Correct |
4 ms |
7628 KB |
Output is correct |
| 32 |
Correct |
5 ms |
7756 KB |
Output is correct |
| 33 |
Correct |
5 ms |
8012 KB |
Output is correct |
| 34 |
Correct |
4 ms |
7372 KB |
Output is correct |
| 35 |
Correct |
5 ms |
8140 KB |
Output is correct |
| 36 |
Correct |
6 ms |
8652 KB |
Output is correct |
| 37 |
Correct |
5 ms |
8140 KB |
Output is correct |
| 38 |
Correct |
5 ms |
7060 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 2 |
Correct |
2 ms |
5000 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 16 |
Correct |
3 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 |
158 ms |
10624 KB |
Output is correct |
| 20 |
Correct |
119 ms |
10560 KB |
Output is correct |
| 21 |
Correct |
154 ms |
10644 KB |
Output is correct |
| 22 |
Correct |
119 ms |
10696 KB |
Output is correct |
| 23 |
Correct |
71 ms |
10876 KB |
Output is correct |
| 24 |
Correct |
59 ms |
10696 KB |
Output is correct |
| 25 |
Correct |
135 ms |
14124 KB |
Output is correct |
| 26 |
Correct |
103 ms |
17880 KB |
Output is correct |
| 27 |
Correct |
180 ms |
16428 KB |
Output is correct |
| 28 |
Correct |
308 ms |
30852 KB |
Output is correct |
| 29 |
Correct |
245 ms |
29604 KB |
Output is correct |
| 30 |
Correct |
179 ms |
16352 KB |
Output is correct |
| 31 |
Correct |
176 ms |
16488 KB |
Output is correct |
| 32 |
Correct |
213 ms |
16468 KB |
Output is correct |
| 33 |
Correct |
238 ms |
15360 KB |
Output is correct |
| 34 |
Correct |
194 ms |
15320 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
5036 KB |
Output is correct |
| 2 |
Correct |
2 ms |
5000 KB |
Output is correct |
| 3 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 6 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 8 |
Correct |
2 ms |
4940 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4940 KB |
Output is correct |
| 15 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 16 |
Correct |
3 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 |
2 ms |
4956 KB |
Output is correct |
| 20 |
Correct |
3 ms |
4940 KB |
Output is correct |
| 21 |
Correct |
3 ms |
5068 KB |
Output is correct |
| 22 |
Correct |
4 ms |
8652 KB |
Output is correct |
| 23 |
Correct |
5 ms |
7968 KB |
Output is correct |
| 24 |
Correct |
5 ms |
8336 KB |
Output is correct |
| 25 |
Correct |
5 ms |
8268 KB |
Output is correct |
| 26 |
Correct |
5 ms |
6348 KB |
Output is correct |
| 27 |
Correct |
5 ms |
8140 KB |
Output is correct |
| 28 |
Correct |
4 ms |
5836 KB |
Output is correct |
| 29 |
Correct |
4 ms |
6348 KB |
Output is correct |
| 30 |
Correct |
4 ms |
6476 KB |
Output is correct |
| 31 |
Correct |
4 ms |
7628 KB |
Output is correct |
| 32 |
Correct |
5 ms |
7756 KB |
Output is correct |
| 33 |
Correct |
5 ms |
8012 KB |
Output is correct |
| 34 |
Correct |
4 ms |
7372 KB |
Output is correct |
| 35 |
Correct |
5 ms |
8140 KB |
Output is correct |
| 36 |
Correct |
6 ms |
8652 KB |
Output is correct |
| 37 |
Correct |
5 ms |
8140 KB |
Output is correct |
| 38 |
Correct |
5 ms |
7060 KB |
Output is correct |
| 39 |
Correct |
158 ms |
10624 KB |
Output is correct |
| 40 |
Correct |
119 ms |
10560 KB |
Output is correct |
| 41 |
Correct |
154 ms |
10644 KB |
Output is correct |
| 42 |
Correct |
119 ms |
10696 KB |
Output is correct |
| 43 |
Correct |
71 ms |
10876 KB |
Output is correct |
| 44 |
Correct |
59 ms |
10696 KB |
Output is correct |
| 45 |
Correct |
135 ms |
14124 KB |
Output is correct |
| 46 |
Correct |
103 ms |
17880 KB |
Output is correct |
| 47 |
Correct |
180 ms |
16428 KB |
Output is correct |
| 48 |
Correct |
308 ms |
30852 KB |
Output is correct |
| 49 |
Correct |
245 ms |
29604 KB |
Output is correct |
| 50 |
Correct |
179 ms |
16352 KB |
Output is correct |
| 51 |
Correct |
176 ms |
16488 KB |
Output is correct |
| 52 |
Correct |
213 ms |
16468 KB |
Output is correct |
| 53 |
Correct |
238 ms |
15360 KB |
Output is correct |
| 54 |
Correct |
194 ms |
15320 KB |
Output is correct |
| 55 |
Correct |
10 ms |
5580 KB |
Output is correct |
| 56 |
Correct |
11 ms |
5464 KB |
Output is correct |
| 57 |
Correct |
81 ms |
10860 KB |
Output is correct |
| 58 |
Correct |
33 ms |
10848 KB |
Output is correct |
| 59 |
Correct |
96 ms |
18744 KB |
Output is correct |
| 60 |
Correct |
506 ms |
34016 KB |
Output is correct |
| 61 |
Correct |
185 ms |
16472 KB |
Output is correct |
| 62 |
Correct |
216 ms |
20344 KB |
Output is correct |
| 63 |
Correct |
310 ms |
20360 KB |
Output is correct |
| 64 |
Correct |
597 ms |
18268 KB |
Output is correct |
| 65 |
Correct |
248 ms |
16404 KB |
Output is correct |
| 66 |
Correct |
432 ms |
30892 KB |
Output is correct |
| 67 |
Correct |
110 ms |
20612 KB |
Output is correct |
| 68 |
Correct |
264 ms |
20384 KB |
Output is correct |
| 69 |
Correct |
293 ms |
20528 KB |
Output is correct |
| 70 |
Correct |
262 ms |
20056 KB |
Output is correct |
