#include <bits/stdc++.h>
#include "race.h"
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pii;
#define pb push_back
#define f first
#define s second
vector<pii>ad[200000];
map<ll,ll>m[200000];
ll ans = (ll)1e16,x;
void dfs(int node,int parent,int depth,ll cost){
long long t = cost * 2 + x;
m[node][cost] = depth;
for (auto i : ad[node])
if(i.f != parent){
dfs(i.f,node,depth + 1,cost + i.s);
if((int)m[i.f].size() > (int)m[node].size()) m[node].swap(m[i.f]);
for (auto v : m[i.f])
if(m[node].find(t - v.f) != m[node].end())
ans = min(ans,m[node][t - v.f] + v.s - 2 * depth);
for (auto v : m[i.f])
if(m[node].find(v.f) != m[node].end()) m[node][v.f] = min(m[node][v.f],v.s);
else m[node].insert(v);
}
}
int best_path(int N, int K, int H[][2], int L[]){
x = K;
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(0,0,0,0);
return ans == (ll)1e16 ? -1 : ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 2 |
Correct |
7 ms |
14392 KB |
Output is correct |
| 3 |
Correct |
7 ms |
14400 KB |
Output is correct |
| 4 |
Correct |
6 ms |
14344 KB |
Output is correct |
| 5 |
Correct |
6 ms |
14404 KB |
Output is correct |
| 6 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 7 |
Correct |
6 ms |
14336 KB |
Output is correct |
| 8 |
Correct |
6 ms |
14376 KB |
Output is correct |
| 9 |
Correct |
8 ms |
14464 KB |
Output is correct |
| 10 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 11 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 12 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 13 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 14 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 15 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 16 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 17 |
Correct |
6 ms |
14424 KB |
Output is correct |
| 18 |
Correct |
7 ms |
14420 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 2 |
Correct |
7 ms |
14392 KB |
Output is correct |
| 3 |
Correct |
7 ms |
14400 KB |
Output is correct |
| 4 |
Correct |
6 ms |
14344 KB |
Output is correct |
| 5 |
Correct |
6 ms |
14404 KB |
Output is correct |
| 6 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 7 |
Correct |
6 ms |
14336 KB |
Output is correct |
| 8 |
Correct |
6 ms |
14376 KB |
Output is correct |
| 9 |
Correct |
8 ms |
14464 KB |
Output is correct |
| 10 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 11 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 12 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 13 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 14 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 15 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 16 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 17 |
Correct |
6 ms |
14424 KB |
Output is correct |
| 18 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 19 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 20 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 21 |
Correct |
7 ms |
14548 KB |
Output is correct |
| 22 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 23 |
Correct |
8 ms |
14668 KB |
Output is correct |
| 24 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 25 |
Correct |
7 ms |
14668 KB |
Output is correct |
| 26 |
Correct |
7 ms |
14664 KB |
Output is correct |
| 27 |
Correct |
9 ms |
14548 KB |
Output is correct |
| 28 |
Correct |
12 ms |
14676 KB |
Output is correct |
| 29 |
Correct |
9 ms |
14696 KB |
Output is correct |
| 30 |
Correct |
8 ms |
14672 KB |
Output is correct |
| 31 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 32 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 33 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 34 |
Correct |
7 ms |
14672 KB |
Output is correct |
| 35 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 36 |
Correct |
7 ms |
14660 KB |
Output is correct |
| 37 |
Correct |
8 ms |
14660 KB |
Output is correct |
| 38 |
Correct |
8 ms |
14676 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 2 |
Correct |
7 ms |
14392 KB |
Output is correct |
| 3 |
Correct |
7 ms |
14400 KB |
Output is correct |
| 4 |
Correct |
6 ms |
14344 KB |
Output is correct |
| 5 |
Correct |
6 ms |
14404 KB |
Output is correct |
| 6 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 7 |
Correct |
6 ms |
14336 KB |
Output is correct |
| 8 |
Correct |
6 ms |
14376 KB |
Output is correct |
| 9 |
Correct |
8 ms |
14464 KB |
Output is correct |
| 10 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 11 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 12 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 13 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 14 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 15 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 16 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 17 |
Correct |
6 ms |
14424 KB |
Output is correct |
| 18 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 19 |
Correct |
97 ms |
37644 KB |
Output is correct |
| 20 |
Correct |
109 ms |
37636 KB |
Output is correct |
| 21 |
Correct |
93 ms |
37360 KB |
Output is correct |
| 22 |
Correct |
95 ms |
36876 KB |
Output is correct |
| 23 |
Correct |
132 ms |
49812 KB |
Output is correct |
| 24 |
Correct |
101 ms |
39864 KB |
Output is correct |
| 25 |
Correct |
91 ms |
39264 KB |
Output is correct |
| 26 |
Correct |
49 ms |
48216 KB |
Output is correct |
| 27 |
Correct |
158 ms |
49496 KB |
Output is correct |
| 28 |
Correct |
261 ms |
94824 KB |
Output is correct |
| 29 |
Correct |
264 ms |
92732 KB |
Output is correct |
| 30 |
Correct |
162 ms |
49668 KB |
Output is correct |
| 31 |
Correct |
164 ms |
49476 KB |
Output is correct |
| 32 |
Correct |
206 ms |
49768 KB |
Output is correct |
| 33 |
Correct |
188 ms |
54348 KB |
Output is correct |
| 34 |
Correct |
265 ms |
87256 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 2 |
Correct |
7 ms |
14392 KB |
Output is correct |
| 3 |
Correct |
7 ms |
14400 KB |
Output is correct |
| 4 |
Correct |
6 ms |
14344 KB |
Output is correct |
| 5 |
Correct |
6 ms |
14404 KB |
Output is correct |
| 6 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 7 |
Correct |
6 ms |
14336 KB |
Output is correct |
| 8 |
Correct |
6 ms |
14376 KB |
Output is correct |
| 9 |
Correct |
8 ms |
14464 KB |
Output is correct |
| 10 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 11 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 12 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 13 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 14 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 15 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 16 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 17 |
Correct |
6 ms |
14424 KB |
Output is correct |
| 18 |
Correct |
7 ms |
14420 KB |
Output is correct |
| 19 |
Correct |
6 ms |
14400 KB |
Output is correct |
| 20 |
Correct |
6 ms |
14420 KB |
Output is correct |
| 21 |
Correct |
7 ms |
14548 KB |
Output is correct |
| 22 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 23 |
Correct |
8 ms |
14668 KB |
Output is correct |
| 24 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 25 |
Correct |
7 ms |
14668 KB |
Output is correct |
| 26 |
Correct |
7 ms |
14664 KB |
Output is correct |
| 27 |
Correct |
9 ms |
14548 KB |
Output is correct |
| 28 |
Correct |
12 ms |
14676 KB |
Output is correct |
| 29 |
Correct |
9 ms |
14696 KB |
Output is correct |
| 30 |
Correct |
8 ms |
14672 KB |
Output is correct |
| 31 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 32 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 33 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 34 |
Correct |
7 ms |
14672 KB |
Output is correct |
| 35 |
Correct |
7 ms |
14676 KB |
Output is correct |
| 36 |
Correct |
7 ms |
14660 KB |
Output is correct |
| 37 |
Correct |
8 ms |
14660 KB |
Output is correct |
| 38 |
Correct |
8 ms |
14676 KB |
Output is correct |
| 39 |
Correct |
97 ms |
37644 KB |
Output is correct |
| 40 |
Correct |
109 ms |
37636 KB |
Output is correct |
| 41 |
Correct |
93 ms |
37360 KB |
Output is correct |
| 42 |
Correct |
95 ms |
36876 KB |
Output is correct |
| 43 |
Correct |
132 ms |
49812 KB |
Output is correct |
| 44 |
Correct |
101 ms |
39864 KB |
Output is correct |
| 45 |
Correct |
91 ms |
39264 KB |
Output is correct |
| 46 |
Correct |
49 ms |
48216 KB |
Output is correct |
| 47 |
Correct |
158 ms |
49496 KB |
Output is correct |
| 48 |
Correct |
261 ms |
94824 KB |
Output is correct |
| 49 |
Correct |
264 ms |
92732 KB |
Output is correct |
| 50 |
Correct |
162 ms |
49668 KB |
Output is correct |
| 51 |
Correct |
164 ms |
49476 KB |
Output is correct |
| 52 |
Correct |
206 ms |
49768 KB |
Output is correct |
| 53 |
Correct |
188 ms |
54348 KB |
Output is correct |
| 54 |
Correct |
265 ms |
87256 KB |
Output is correct |
| 55 |
Correct |
17 ms |
17620 KB |
Output is correct |
| 56 |
Correct |
13 ms |
16328 KB |
Output is correct |
| 57 |
Correct |
59 ms |
35032 KB |
Output is correct |
| 58 |
Correct |
45 ms |
27580 KB |
Output is correct |
| 59 |
Correct |
89 ms |
54408 KB |
Output is correct |
| 60 |
Correct |
243 ms |
93272 KB |
Output is correct |
| 61 |
Correct |
183 ms |
53032 KB |
Output is correct |
| 62 |
Correct |
149 ms |
49560 KB |
Output is correct |
| 63 |
Correct |
207 ms |
49560 KB |
Output is correct |
| 64 |
Correct |
369 ms |
104500 KB |
Output is correct |
| 65 |
Correct |
354 ms |
102468 KB |
Output is correct |
| 66 |
Correct |
262 ms |
88272 KB |
Output is correct |
| 67 |
Correct |
134 ms |
42340 KB |
Output is correct |
| 68 |
Correct |
288 ms |
65988 KB |
Output is correct |
| 69 |
Correct |
319 ms |
70644 KB |
Output is correct |
| 70 |
Correct |
267 ms |
63692 KB |
Output is correct |
