#include<bits/stdc++.h>
using namespace std;
using ll=long long;
using ar=array<ll,2>;
ll n,k,res=1e7;
vector<ar>g[200000];
ll sz[200000];
bool used[200000];
map<ll,ll>mp;
void siz(ll v, ll e){
sz[v]=1;
for(const auto&[i,w]:g[v])
if(i!=e and !used[i]) siz(i,v),sz[v]+=sz[i];
}
ll get(ll v, ll e, ll des){
for(const auto&[i,w]:g[v])
if(i!=e and !used[i] and sz[i]>des) return get(i,v,des);
return v;
}
void help(ll v, ll e, ll km, ll d, bool fill){
if(km>k) return;
if(fill){
if(!mp.count(km)) mp[km]=d;
else mp[km]=min(mp[km],d);
}
else{
if(km==k) res=min(res,d);
else if(mp.count(k-km)) res=min(res,d+mp[k-km]);
}
for(const auto&[i,w]:g[v])
if(i!=e and !used[i]) help(i,v,km+w,d+1,fill);
}
void decomp(ll v=0){
siz(v,-1);
ll c=get(v,-1,sz[v]>>1);
used[c]=1;
mp.clear();
for(const auto&[i,w]:g[c])
if(!used[i]){
help(i,c,w,1,0);
help(i,c,w,1,1);
}
for(const auto&[i,w]:g[c])
if(!used[i]) decomp(i);
}
int best_path(int N, int K, int H[][2],int L[]){
n=N;
k=K;
for(ll 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]});
}
decomp();
if(res==1e7) res=-1;
return res;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 3 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 5 |
Correct |
4 ms |
4952 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4948 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 3 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 5 |
Correct |
4 ms |
4952 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 20 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 21 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 22 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 23 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 24 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 25 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 26 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 27 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 28 |
Correct |
4 ms |
5132 KB |
Output is correct |
| 29 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 30 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 31 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 32 |
Correct |
4 ms |
5148 KB |
Output is correct |
| 33 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 34 |
Correct |
3 ms |
5048 KB |
Output is correct |
| 35 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 37 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5076 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 3 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 5 |
Correct |
4 ms |
4952 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 19 |
Correct |
179 ms |
12088 KB |
Output is correct |
| 20 |
Correct |
175 ms |
12056 KB |
Output is correct |
| 21 |
Correct |
187 ms |
12128 KB |
Output is correct |
| 22 |
Correct |
181 ms |
12160 KB |
Output is correct |
| 23 |
Correct |
75 ms |
12536 KB |
Output is correct |
| 24 |
Correct |
70 ms |
11744 KB |
Output is correct |
| 25 |
Correct |
125 ms |
15008 KB |
Output is correct |
| 26 |
Correct |
93 ms |
18004 KB |
Output is correct |
| 27 |
Correct |
173 ms |
19856 KB |
Output is correct |
| 28 |
Correct |
253 ms |
30948 KB |
Output is correct |
| 29 |
Correct |
245 ms |
29964 KB |
Output is correct |
| 30 |
Correct |
173 ms |
19792 KB |
Output is correct |
| 31 |
Correct |
177 ms |
19820 KB |
Output is correct |
| 32 |
Correct |
194 ms |
19732 KB |
Output is correct |
| 33 |
Correct |
252 ms |
18620 KB |
Output is correct |
| 34 |
Correct |
172 ms |
18636 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 3 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 5 |
Correct |
4 ms |
4952 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 7 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 11 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 12 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 13 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 14 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 15 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 16 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 17 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 18 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 19 |
Correct |
3 ms |
4948 KB |
Output is correct |
| 20 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 21 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 22 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 23 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 24 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 25 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 26 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 27 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 28 |
Correct |
4 ms |
5132 KB |
Output is correct |
| 29 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 30 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 31 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 32 |
Correct |
4 ms |
5148 KB |
Output is correct |
| 33 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 34 |
Correct |
3 ms |
5048 KB |
Output is correct |
| 35 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 36 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 37 |
Correct |
4 ms |
5076 KB |
Output is correct |
| 38 |
Correct |
3 ms |
5076 KB |
Output is correct |
| 39 |
Correct |
179 ms |
12088 KB |
Output is correct |
| 40 |
Correct |
175 ms |
12056 KB |
Output is correct |
| 41 |
Correct |
187 ms |
12128 KB |
Output is correct |
| 42 |
Correct |
181 ms |
12160 KB |
Output is correct |
| 43 |
Correct |
75 ms |
12536 KB |
Output is correct |
| 44 |
Correct |
70 ms |
11744 KB |
Output is correct |
| 45 |
Correct |
125 ms |
15008 KB |
Output is correct |
| 46 |
Correct |
93 ms |
18004 KB |
Output is correct |
| 47 |
Correct |
173 ms |
19856 KB |
Output is correct |
| 48 |
Correct |
253 ms |
30948 KB |
Output is correct |
| 49 |
Correct |
245 ms |
29964 KB |
Output is correct |
| 50 |
Correct |
173 ms |
19792 KB |
Output is correct |
| 51 |
Correct |
177 ms |
19820 KB |
Output is correct |
| 52 |
Correct |
194 ms |
19732 KB |
Output is correct |
| 53 |
Correct |
252 ms |
18620 KB |
Output is correct |
| 54 |
Correct |
172 ms |
18636 KB |
Output is correct |
| 55 |
Correct |
19 ms |
5836 KB |
Output is correct |
| 56 |
Correct |
16 ms |
5736 KB |
Output is correct |
| 57 |
Correct |
130 ms |
12492 KB |
Output is correct |
| 58 |
Correct |
39 ms |
11708 KB |
Output is correct |
| 59 |
Correct |
266 ms |
22756 KB |
Output is correct |
| 60 |
Correct |
820 ms |
41872 KB |
Output is correct |
| 61 |
Correct |
239 ms |
20040 KB |
Output is correct |
| 62 |
Correct |
260 ms |
19900 KB |
Output is correct |
| 63 |
Correct |
329 ms |
20096 KB |
Output is correct |
| 64 |
Correct |
942 ms |
25560 KB |
Output is correct |
| 65 |
Correct |
203 ms |
19264 KB |
Output is correct |
| 66 |
Correct |
510 ms |
28256 KB |
Output is correct |
| 67 |
Correct |
108 ms |
18564 KB |
Output is correct |
| 68 |
Correct |
356 ms |
24256 KB |
Output is correct |
| 69 |
Correct |
386 ms |
23688 KB |
Output is correct |
| 70 |
Correct |
329 ms |
23244 KB |
Output is correct |
