#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
#define ar array
using namespace std;
typedef long double ld;
typedef long long ll;
const int inf=1e9+1e8;
const ll linf=4e18+18;
const int N=2e5;
int n, k, h[N], ans=inf; ll dep[N];
map<ll,int> dp[N];
vector<ar<int,2>> g[N];
int get(int v, ll x) {
return (dp[v].find(x)!=dp[v].end()?dp[v][x]:inf);
}
void dfs(int v, int p=-1) {
dp[v][dep[v]]=h[v];
for (auto &[u,c] : g[v]) {
if (u!=p) {
h[u]=h[v]+1, dep[u]=dep[v]+c;
dfs(u,v);
if (dp[u].size()>dp[v].size()) swap(dp[v],dp[u]);
for (auto &[x,dh] : dp[u]) {
ans=min(ans,dh+get(v,k-x+2*dep[v])-2*h[v]);
}
for (auto &[x,dh] : dp[u]) {
if (dp[v].find(x)==dp[v].end()) dp[v][x]=dh;
else dp[v][x]=min(dp[v][x],dh);
}
}
}
}
int best_path(int n0, int k0, int h[][2], int l[]) {
n=n0, k=k0;
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]});
}
dfs(0);
return (ans<n?ans:-1);
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 2 |
Correct |
9 ms |
14384 KB |
Output is correct |
| 3 |
Correct |
9 ms |
14400 KB |
Output is correct |
| 4 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 5 |
Correct |
9 ms |
14396 KB |
Output is correct |
| 6 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 7 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14396 KB |
Output is correct |
| 9 |
Correct |
9 ms |
14352 KB |
Output is correct |
| 10 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 11 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 12 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 13 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14400 KB |
Output is correct |
| 15 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 16 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 17 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 18 |
Correct |
9 ms |
14412 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 2 |
Correct |
9 ms |
14384 KB |
Output is correct |
| 3 |
Correct |
9 ms |
14400 KB |
Output is correct |
| 4 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 5 |
Correct |
9 ms |
14396 KB |
Output is correct |
| 6 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 7 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14396 KB |
Output is correct |
| 9 |
Correct |
9 ms |
14352 KB |
Output is correct |
| 10 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 11 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 12 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 13 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14400 KB |
Output is correct |
| 15 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 16 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 17 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 18 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 19 |
Correct |
9 ms |
14440 KB |
Output is correct |
| 20 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 21 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 22 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 23 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 24 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 25 |
Correct |
12 ms |
14668 KB |
Output is correct |
| 26 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 27 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 28 |
Correct |
13 ms |
14668 KB |
Output is correct |
| 29 |
Correct |
10 ms |
14684 KB |
Output is correct |
| 30 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 31 |
Correct |
11 ms |
14636 KB |
Output is correct |
| 32 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 33 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 34 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 35 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 36 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 37 |
Correct |
9 ms |
14540 KB |
Output is correct |
| 38 |
Correct |
10 ms |
14668 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 2 |
Correct |
9 ms |
14384 KB |
Output is correct |
| 3 |
Correct |
9 ms |
14400 KB |
Output is correct |
| 4 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 5 |
Correct |
9 ms |
14396 KB |
Output is correct |
| 6 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 7 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14396 KB |
Output is correct |
| 9 |
Correct |
9 ms |
14352 KB |
Output is correct |
| 10 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 11 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 12 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 13 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14400 KB |
Output is correct |
| 15 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 16 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 17 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 18 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 19 |
Correct |
148 ms |
37276 KB |
Output is correct |
| 20 |
Correct |
177 ms |
37356 KB |
Output is correct |
| 21 |
Correct |
171 ms |
37020 KB |
Output is correct |
| 22 |
Correct |
148 ms |
36636 KB |
Output is correct |
| 23 |
Correct |
190 ms |
49384 KB |
Output is correct |
| 24 |
Correct |
161 ms |
40132 KB |
Output is correct |
| 25 |
Correct |
146 ms |
36288 KB |
Output is correct |
| 26 |
Correct |
78 ms |
43080 KB |
Output is correct |
| 27 |
Correct |
240 ms |
48564 KB |
Output is correct |
| 28 |
Correct |
413 ms |
84672 KB |
Output is correct |
| 29 |
Correct |
366 ms |
83360 KB |
Output is correct |
| 30 |
Correct |
231 ms |
48600 KB |
Output is correct |
| 31 |
Correct |
251 ms |
48572 KB |
Output is correct |
| 32 |
Correct |
290 ms |
48784 KB |
Output is correct |
| 33 |
Correct |
290 ms |
53436 KB |
Output is correct |
| 34 |
Correct |
453 ms |
86448 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 2 |
Correct |
9 ms |
14384 KB |
Output is correct |
| 3 |
Correct |
9 ms |
14400 KB |
Output is correct |
| 4 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 5 |
Correct |
9 ms |
14396 KB |
Output is correct |
| 6 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 7 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14396 KB |
Output is correct |
| 9 |
Correct |
9 ms |
14352 KB |
Output is correct |
| 10 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 11 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 12 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 13 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14400 KB |
Output is correct |
| 15 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 16 |
Correct |
10 ms |
14412 KB |
Output is correct |
| 17 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 18 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 19 |
Correct |
9 ms |
14440 KB |
Output is correct |
| 20 |
Correct |
9 ms |
14412 KB |
Output is correct |
| 21 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 22 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 23 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 24 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 25 |
Correct |
12 ms |
14668 KB |
Output is correct |
| 26 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 27 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 28 |
Correct |
13 ms |
14668 KB |
Output is correct |
| 29 |
Correct |
10 ms |
14684 KB |
Output is correct |
| 30 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 31 |
Correct |
11 ms |
14636 KB |
Output is correct |
| 32 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 33 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 34 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 35 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 36 |
Correct |
10 ms |
14540 KB |
Output is correct |
| 37 |
Correct |
9 ms |
14540 KB |
Output is correct |
| 38 |
Correct |
10 ms |
14668 KB |
Output is correct |
| 39 |
Correct |
148 ms |
37276 KB |
Output is correct |
| 40 |
Correct |
177 ms |
37356 KB |
Output is correct |
| 41 |
Correct |
171 ms |
37020 KB |
Output is correct |
| 42 |
Correct |
148 ms |
36636 KB |
Output is correct |
| 43 |
Correct |
190 ms |
49384 KB |
Output is correct |
| 44 |
Correct |
161 ms |
40132 KB |
Output is correct |
| 45 |
Correct |
146 ms |
36288 KB |
Output is correct |
| 46 |
Correct |
78 ms |
43080 KB |
Output is correct |
| 47 |
Correct |
240 ms |
48564 KB |
Output is correct |
| 48 |
Correct |
413 ms |
84672 KB |
Output is correct |
| 49 |
Correct |
366 ms |
83360 KB |
Output is correct |
| 50 |
Correct |
231 ms |
48600 KB |
Output is correct |
| 51 |
Correct |
251 ms |
48572 KB |
Output is correct |
| 52 |
Correct |
290 ms |
48784 KB |
Output is correct |
| 53 |
Correct |
290 ms |
53436 KB |
Output is correct |
| 54 |
Correct |
453 ms |
86448 KB |
Output is correct |
| 55 |
Correct |
30 ms |
17616 KB |
Output is correct |
| 56 |
Correct |
20 ms |
16384 KB |
Output is correct |
| 57 |
Correct |
98 ms |
34824 KB |
Output is correct |
| 58 |
Correct |
62 ms |
27900 KB |
Output is correct |
| 59 |
Correct |
110 ms |
49288 KB |
Output is correct |
| 60 |
Correct |
372 ms |
83540 KB |
Output is correct |
| 61 |
Correct |
260 ms |
52164 KB |
Output is correct |
| 62 |
Correct |
225 ms |
48668 KB |
Output is correct |
| 63 |
Correct |
282 ms |
48860 KB |
Output is correct |
| 64 |
Correct |
526 ms |
103892 KB |
Output is correct |
| 65 |
Correct |
514 ms |
102004 KB |
Output is correct |
| 66 |
Correct |
367 ms |
80324 KB |
Output is correct |
| 67 |
Correct |
225 ms |
43048 KB |
Output is correct |
| 68 |
Correct |
406 ms |
65560 KB |
Output is correct |
| 69 |
Correct |
505 ms |
70756 KB |
Output is correct |
| 70 |
Correct |
377 ms |
63536 KB |
Output is correct |
