#include "race.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll maxn = 2e5+4;
vector <bool> vis;
vector <map <ll, ll>> f;
vector <ll> dep_points, dep_len;
ll sol = maxn;
void dfs_dep(ll c, vector <pair<ll, ll>> g[]){
vis[c] = 1;
for (auto x : g[c]){
if (vis[x.first])continue;
dep_points[x.first] = dep_points[c]+1;
dep_len[x.first] = dep_len[c]+x.second;
dfs_dep(x.first, g);
}
vis[c] = 0;
}
void compare_merge(map <ll, ll> &x, map <ll, ll> &y, ll add, ll c, ll k){
if (x.size() > y.size())swap(x, y);
for (auto it = x.begin(); it != x.end(); it++){
if (k+add-(it->first) < 0)break;
if (!y.count(k+add-(it->first)))continue;
ll v = (it->first);
sol = min(sol, x[v]+y[k+add-v]-2*dep_points[c]);
}
for (auto it = x.begin(); it != x.end(); it++){
if (!y.count(it->first))y[it->first] = (it->second);
else y[it->first] = min(y[it->first], it->second);
}
x.clear();
}
void dfs_solve(ll c, vector <pair<ll, ll>> g[], ll k){
vis[c] = 1;
for (auto x : g[c]){
if (vis[x.first])continue;
dfs_solve(x.first, g, k);
compare_merge(f[x.first], f[c], 2*dep_len[c], c, k);
}
f[c][dep_len[c]] = dep_points[c];
if (f[c].count(k+dep_len[c]))sol = min(sol, f[c][k+dep_len[c]]-dep_points[c]);
}
int best_path(int N, int K, int H[][2], int L[]){
ll n = N, k = K;
vector <pair<ll, ll>> g[n];
vis.resize(n, 0);
for (int i = 0; i < n-1; i++){
g[H[i][0]].push_back({H[i][1], L[i]});
g[H[i][1]].push_back({H[i][0], L[i]});
}
f.resize(n);
dep_len.resize(n, 0);
dep_points.resize(n, 0);
dfs_dep(0, g);
dfs_solve(0, g, k);
if (sol == maxn)return -1;
else return sol;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2392 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2488 KB |
Output is correct |
| 16 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 18 |
Correct |
0 ms |
2396 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2392 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2488 KB |
Output is correct |
| 16 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 18 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 19 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2500 KB |
Output is correct |
| 22 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 23 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 24 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 25 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 26 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 27 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 28 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 29 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 30 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 31 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 32 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 33 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 34 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 35 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 36 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 37 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 38 |
Correct |
1 ms |
2652 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2392 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2488 KB |
Output is correct |
| 16 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 18 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 19 |
Correct |
79 ms |
18512 KB |
Output is correct |
| 20 |
Correct |
77 ms |
19800 KB |
Output is correct |
| 21 |
Correct |
87 ms |
19836 KB |
Output is correct |
| 22 |
Correct |
80 ms |
19792 KB |
Output is correct |
| 23 |
Correct |
106 ms |
20308 KB |
Output is correct |
| 24 |
Correct |
79 ms |
19512 KB |
Output is correct |
| 25 |
Correct |
61 ms |
25680 KB |
Output is correct |
| 26 |
Correct |
46 ms |
30408 KB |
Output is correct |
| 27 |
Correct |
129 ms |
35664 KB |
Output is correct |
| 28 |
Correct |
209 ms |
68804 KB |
Output is correct |
| 29 |
Correct |
198 ms |
67980 KB |
Output is correct |
| 30 |
Correct |
127 ms |
35756 KB |
Output is correct |
| 31 |
Correct |
126 ms |
35664 KB |
Output is correct |
| 32 |
Correct |
182 ms |
35664 KB |
Output is correct |
| 33 |
Correct |
180 ms |
35032 KB |
Output is correct |
| 34 |
Correct |
266 ms |
48212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2392 KB |
Output is correct |
| 8 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2488 KB |
Output is correct |
| 16 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 18 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 19 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2500 KB |
Output is correct |
| 22 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 23 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 24 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 25 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 26 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 27 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 28 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 29 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 30 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 31 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 32 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 33 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 34 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 35 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 36 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 37 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 38 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 39 |
Correct |
79 ms |
18512 KB |
Output is correct |
| 40 |
Correct |
77 ms |
19800 KB |
Output is correct |
| 41 |
Correct |
87 ms |
19836 KB |
Output is correct |
| 42 |
Correct |
80 ms |
19792 KB |
Output is correct |
| 43 |
Correct |
106 ms |
20308 KB |
Output is correct |
| 44 |
Correct |
79 ms |
19512 KB |
Output is correct |
| 45 |
Correct |
61 ms |
25680 KB |
Output is correct |
| 46 |
Correct |
46 ms |
30408 KB |
Output is correct |
| 47 |
Correct |
129 ms |
35664 KB |
Output is correct |
| 48 |
Correct |
209 ms |
68804 KB |
Output is correct |
| 49 |
Correct |
198 ms |
67980 KB |
Output is correct |
| 50 |
Correct |
127 ms |
35756 KB |
Output is correct |
| 51 |
Correct |
126 ms |
35664 KB |
Output is correct |
| 52 |
Correct |
182 ms |
35664 KB |
Output is correct |
| 53 |
Correct |
180 ms |
35032 KB |
Output is correct |
| 54 |
Correct |
266 ms |
48212 KB |
Output is correct |
| 55 |
Correct |
11 ms |
4440 KB |
Output is correct |
| 56 |
Correct |
6 ms |
3932 KB |
Output is correct |
| 57 |
Correct |
44 ms |
19932 KB |
Output is correct |
| 58 |
Correct |
45 ms |
19012 KB |
Output is correct |
| 59 |
Correct |
65 ms |
36468 KB |
Output is correct |
| 60 |
Correct |
186 ms |
67924 KB |
Output is correct |
| 61 |
Correct |
165 ms |
37460 KB |
Output is correct |
| 62 |
Correct |
141 ms |
35712 KB |
Output is correct |
| 63 |
Correct |
166 ms |
35668 KB |
Output is correct |
| 64 |
Correct |
350 ms |
44116 KB |
Output is correct |
| 65 |
Correct |
348 ms |
48716 KB |
Output is correct |
| 66 |
Correct |
209 ms |
66640 KB |
Output is correct |
| 67 |
Correct |
119 ms |
34752 KB |
Output is correct |
| 68 |
Correct |
266 ms |
46164 KB |
Output is correct |
| 69 |
Correct |
258 ms |
50412 KB |
Output is correct |
| 70 |
Correct |
236 ms |
44096 KB |
Output is correct |
