#include "race.h"
#include <bits/stdc++.h>
#define X first
#define Y second
using namespace std;
typedef long long llint;
const int maxn = 2e5+10;
const int maxk = 1e6+10;
const int inf = 0x3f3f3f3f;
int n, k;
vector< pair<int, int> > graph[maxn];
map< llint, llint > s[maxn];
llint sol = inf;
llint ofx[maxn], ofy[maxn];
void solve(int x, int parr) {
//printf("solving: %d %d\n", x, parr);
s[x][0] = 0;
for (auto iter : graph[x]) {
int tren = iter.X;
int cost = iter.Y;
if (tren == parr) continue;
solve(tren, x);
//printf("merging %d %d\n", x, tren);
ofx[tren] += cost;
ofy[tren]++;
if (s[tren].size() > s[x].size()) {
//printf("child is larger\n");
swap(s[tren], s[x]);
swap(ofx[tren], ofx[x]);
swap(ofy[tren], ofy[x]);
}
for (auto iter : s[tren]) {
llint dis = iter.X + ofx[tren];
//printf("trying %lld\n", dis);
if (s[x].count(k - dis - ofx[x]))
sol = min(sol, s[x][k - dis - ofx[x]] + iter.Y + ofy[tren] + ofy[x]);
dis -= ofx[x];
}
for (auto iter : s[tren]) {
llint dis = iter.X + ofx[tren] - ofx[x];
if (s[x].count(dis)) s[x][dis] = min(s[x][dis], iter.Y + ofy[tren] - ofy[x]);
else s[x][dis] = iter.Y + ofy[tren] - ofy[x];
}
}
}
int best_path(int N, int K, int H[][2], int L[])
{
n = N, k = K;
for (int i = 0; i < n - 1; i++) {
int a = H[i][0];
int b = H[i][1];
graph[a].push_back({b, L[i]});
graph[b].push_back({a, L[i]});
}
solve(0, -1);
if (sol == inf) return -1;
return sol;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 2 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 3 |
Correct |
8 ms |
14420 KB |
Output is correct |
| 4 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 5 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 6 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 7 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 8 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 9 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 10 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 11 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 12 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 13 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 14 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 15 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 16 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 17 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 18 |
Correct |
7 ms |
14420 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 2 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 3 |
Correct |
8 ms |
14420 KB |
Output is correct |
| 4 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 5 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 6 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 7 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 8 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 9 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 10 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 11 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 12 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 13 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 14 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 15 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 16 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 17 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 18 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 19 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 20 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 21 |
Correct |
8 ms |
14548 KB |
Output is correct |
| 22 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 23 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 24 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 25 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 26 |
Correct |
7 ms |
14752 KB |
Output is correct |
| 27 |
Correct |
8 ms |
14548 KB |
Output is correct |
| 28 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 29 |
Correct |
9 ms |
14724 KB |
Output is correct |
| 30 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 31 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 32 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 33 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 34 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 35 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 36 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 37 |
Correct |
8 ms |
14548 KB |
Output is correct |
| 38 |
Correct |
7 ms |
14676 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 2 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 3 |
Correct |
8 ms |
14420 KB |
Output is correct |
| 4 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 5 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 6 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 7 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 8 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 9 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 10 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 11 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 12 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 13 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 14 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 15 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 16 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 17 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 18 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 19 |
Correct |
102 ms |
36336 KB |
Output is correct |
| 20 |
Correct |
125 ms |
37732 KB |
Output is correct |
| 21 |
Correct |
98 ms |
37508 KB |
Output is correct |
| 22 |
Correct |
112 ms |
37068 KB |
Output is correct |
| 23 |
Correct |
143 ms |
49860 KB |
Output is correct |
| 24 |
Correct |
128 ms |
40440 KB |
Output is correct |
| 25 |
Correct |
115 ms |
36716 KB |
Output is correct |
| 26 |
Correct |
57 ms |
43492 KB |
Output is correct |
| 27 |
Correct |
157 ms |
49340 KB |
Output is correct |
| 28 |
Correct |
253 ms |
85544 KB |
Output is correct |
| 29 |
Correct |
246 ms |
84044 KB |
Output is correct |
| 30 |
Correct |
199 ms |
49400 KB |
Output is correct |
| 31 |
Correct |
160 ms |
49428 KB |
Output is correct |
| 32 |
Correct |
285 ms |
49484 KB |
Output is correct |
| 33 |
Correct |
230 ms |
54340 KB |
Output is correct |
| 34 |
Correct |
298 ms |
87116 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 2 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 3 |
Correct |
8 ms |
14420 KB |
Output is correct |
| 4 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 5 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 6 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 7 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 8 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 9 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 10 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 11 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 12 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 13 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 14 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 15 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 16 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 17 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 18 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 19 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 20 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 21 |
Correct |
8 ms |
14548 KB |
Output is correct |
| 22 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 23 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 24 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 25 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 26 |
Correct |
7 ms |
14752 KB |
Output is correct |
| 27 |
Correct |
8 ms |
14548 KB |
Output is correct |
| 28 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 29 |
Correct |
9 ms |
14724 KB |
Output is correct |
| 30 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 31 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 32 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 33 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 34 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 35 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 36 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 37 |
Correct |
8 ms |
14548 KB |
Output is correct |
| 38 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 39 |
Correct |
102 ms |
36336 KB |
Output is correct |
| 40 |
Correct |
125 ms |
37732 KB |
Output is correct |
| 41 |
Correct |
98 ms |
37508 KB |
Output is correct |
| 42 |
Correct |
112 ms |
37068 KB |
Output is correct |
| 43 |
Correct |
143 ms |
49860 KB |
Output is correct |
| 44 |
Correct |
128 ms |
40440 KB |
Output is correct |
| 45 |
Correct |
115 ms |
36716 KB |
Output is correct |
| 46 |
Correct |
57 ms |
43492 KB |
Output is correct |
| 47 |
Correct |
157 ms |
49340 KB |
Output is correct |
| 48 |
Correct |
253 ms |
85544 KB |
Output is correct |
| 49 |
Correct |
246 ms |
84044 KB |
Output is correct |
| 50 |
Correct |
199 ms |
49400 KB |
Output is correct |
| 51 |
Correct |
160 ms |
49428 KB |
Output is correct |
| 52 |
Correct |
285 ms |
49484 KB |
Output is correct |
| 53 |
Correct |
230 ms |
54340 KB |
Output is correct |
| 54 |
Correct |
298 ms |
87116 KB |
Output is correct |
| 55 |
Correct |
19 ms |
17620 KB |
Output is correct |
| 56 |
Correct |
13 ms |
16432 KB |
Output is correct |
| 57 |
Correct |
66 ms |
35068 KB |
Output is correct |
| 58 |
Correct |
58 ms |
28280 KB |
Output is correct |
| 59 |
Correct |
82 ms |
49740 KB |
Output is correct |
| 60 |
Correct |
249 ms |
84264 KB |
Output is correct |
| 61 |
Correct |
191 ms |
52932 KB |
Output is correct |
| 62 |
Correct |
176 ms |
49480 KB |
Output is correct |
| 63 |
Correct |
232 ms |
49440 KB |
Output is correct |
| 64 |
Correct |
407 ms |
104588 KB |
Output is correct |
| 65 |
Correct |
399 ms |
102824 KB |
Output is correct |
| 66 |
Correct |
252 ms |
81100 KB |
Output is correct |
| 67 |
Correct |
149 ms |
43832 KB |
Output is correct |
| 68 |
Correct |
314 ms |
66444 KB |
Output is correct |
| 69 |
Correct |
362 ms |
71504 KB |
Output is correct |
| 70 |
Correct |
446 ms |
64204 KB |
Output is correct |
