#include <bits/stdc++.h>
using namespace std;
vector<vector<pair<int,int>>> adj;
int n, k;
vector<int> subtr;
vector<bool> vis;
unordered_map<int,int> mp;
int ans=INT_MAX;
void findsize(int u, int p){
subtr[u]=1;
for(auto [v,w]:adj[u]){
if(v!=p and !vis[v]){
findsize(v,u);
subtr[u]+=subtr[v];
}
}
}
int findcentroid(int u, int p, int sz){
for(auto [v,w]:adj[u]){
if(v!=p and !vis[v] and subtr[v]>sz/2)return findcentroid(v,u,sz);
}
return u;
}
void dfs1(int u, int p, int dist, int depth){
if(dist>k)return;
if(mp[k-dist] or k==dist) ans=min(ans,mp[k-dist]+depth);
for(auto [v,w]:adj[u]){
if(v!=p and !vis[v]){
dfs1(v,u,dist+w,depth+1);
}
}
}
void dfs2(int u, int p, int dist, int depth){
if(dist>k)return;
if(mp[dist]==0)mp[dist]=depth;
else mp[dist]=min(mp[dist],depth);
for(auto [v,w]:adj[u]){
if(v!=p and !vis[v]){
dfs2(v,u,dist+w,depth+1);
}
}
}
void buildcentroid(int u, int p){
findsize(u,u);
int c=findcentroid(u,u,subtr[u]);
vis[c]=true;
for(auto [v,w]:adj[c]){
if(v!=p and !vis[v]){
dfs1(v,c,w,1);
dfs2(v,c,w,1);
}
}
mp.clear();
for(auto [v,w]:adj[c]){
if(!vis[v])buildcentroid(v,c);
}
}
int best_path(int N, int K, int H[][2], int L[]){
n=N;
k=K;
adj.resize(n);
subtr.resize(n);
vis.resize(n);
for(int i=0;i<n-1;i++){
adj[H[i][1]].push_back({H[i][0],L[i]});
adj[H[i][0]].push_back({H[i][1],L[i]});
}
buildcentroid(0,-1);
if(ans==INT_MAX)return -1;
return ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2620 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2396 KB |
Output is correct |
7 |
Correct |
1 ms |
2396 KB |
Output is correct |
8 |
Correct |
1 ms |
2392 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
1 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 |
1 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
1 ms |
2396 KB |
Output is correct |
18 |
Correct |
1 ms |
2396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2620 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2396 KB |
Output is correct |
7 |
Correct |
1 ms |
2396 KB |
Output is correct |
8 |
Correct |
1 ms |
2392 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
1 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 |
1 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
1 ms |
2396 KB |
Output is correct |
18 |
Correct |
1 ms |
2396 KB |
Output is correct |
19 |
Correct |
1 ms |
2392 KB |
Output is correct |
20 |
Correct |
1 ms |
2392 KB |
Output is correct |
21 |
Correct |
2 ms |
2396 KB |
Output is correct |
22 |
Correct |
1 ms |
2396 KB |
Output is correct |
23 |
Correct |
1 ms |
2396 KB |
Output is correct |
24 |
Correct |
1 ms |
2496 KB |
Output is correct |
25 |
Correct |
2 ms |
2652 KB |
Output is correct |
26 |
Correct |
1 ms |
2396 KB |
Output is correct |
27 |
Correct |
1 ms |
2396 KB |
Output is correct |
28 |
Correct |
2 ms |
2396 KB |
Output is correct |
29 |
Correct |
3 ms |
2392 KB |
Output is correct |
30 |
Correct |
2 ms |
2392 KB |
Output is correct |
31 |
Correct |
2 ms |
2644 KB |
Output is correct |
32 |
Correct |
2 ms |
2396 KB |
Output is correct |
33 |
Correct |
2 ms |
2396 KB |
Output is correct |
34 |
Correct |
1 ms |
2396 KB |
Output is correct |
35 |
Correct |
1 ms |
2396 KB |
Output is correct |
36 |
Correct |
1 ms |
2396 KB |
Output is correct |
37 |
Correct |
2 ms |
2396 KB |
Output is correct |
38 |
Correct |
2 ms |
2396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2620 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2396 KB |
Output is correct |
7 |
Correct |
1 ms |
2396 KB |
Output is correct |
8 |
Correct |
1 ms |
2392 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
1 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 |
1 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
1 ms |
2396 KB |
Output is correct |
18 |
Correct |
1 ms |
2396 KB |
Output is correct |
19 |
Correct |
106 ms |
11244 KB |
Output is correct |
20 |
Correct |
120 ms |
12188 KB |
Output is correct |
21 |
Correct |
107 ms |
11876 KB |
Output is correct |
22 |
Correct |
104 ms |
12548 KB |
Output is correct |
23 |
Correct |
56 ms |
12628 KB |
Output is correct |
24 |
Correct |
46 ms |
12384 KB |
Output is correct |
25 |
Correct |
100 ms |
15092 KB |
Output is correct |
26 |
Correct |
91 ms |
17444 KB |
Output is correct |
27 |
Correct |
132 ms |
19092 KB |
Output is correct |
28 |
Correct |
182 ms |
30724 KB |
Output is correct |
29 |
Correct |
187 ms |
30056 KB |
Output is correct |
30 |
Correct |
127 ms |
19724 KB |
Output is correct |
31 |
Correct |
125 ms |
19932 KB |
Output is correct |
32 |
Correct |
138 ms |
19672 KB |
Output is correct |
33 |
Correct |
178 ms |
18656 KB |
Output is correct |
34 |
Correct |
108 ms |
19132 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2620 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2396 KB |
Output is correct |
7 |
Correct |
1 ms |
2396 KB |
Output is correct |
8 |
Correct |
1 ms |
2392 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
1 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 |
1 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
1 ms |
2396 KB |
Output is correct |
18 |
Correct |
1 ms |
2396 KB |
Output is correct |
19 |
Correct |
1 ms |
2392 KB |
Output is correct |
20 |
Correct |
1 ms |
2392 KB |
Output is correct |
21 |
Correct |
2 ms |
2396 KB |
Output is correct |
22 |
Correct |
1 ms |
2396 KB |
Output is correct |
23 |
Correct |
1 ms |
2396 KB |
Output is correct |
24 |
Correct |
1 ms |
2496 KB |
Output is correct |
25 |
Correct |
2 ms |
2652 KB |
Output is correct |
26 |
Correct |
1 ms |
2396 KB |
Output is correct |
27 |
Correct |
1 ms |
2396 KB |
Output is correct |
28 |
Correct |
2 ms |
2396 KB |
Output is correct |
29 |
Correct |
3 ms |
2392 KB |
Output is correct |
30 |
Correct |
2 ms |
2392 KB |
Output is correct |
31 |
Correct |
2 ms |
2644 KB |
Output is correct |
32 |
Correct |
2 ms |
2396 KB |
Output is correct |
33 |
Correct |
2 ms |
2396 KB |
Output is correct |
34 |
Correct |
1 ms |
2396 KB |
Output is correct |
35 |
Correct |
1 ms |
2396 KB |
Output is correct |
36 |
Correct |
1 ms |
2396 KB |
Output is correct |
37 |
Correct |
2 ms |
2396 KB |
Output is correct |
38 |
Correct |
2 ms |
2396 KB |
Output is correct |
39 |
Correct |
106 ms |
11244 KB |
Output is correct |
40 |
Correct |
120 ms |
12188 KB |
Output is correct |
41 |
Correct |
107 ms |
11876 KB |
Output is correct |
42 |
Correct |
104 ms |
12548 KB |
Output is correct |
43 |
Correct |
56 ms |
12628 KB |
Output is correct |
44 |
Correct |
46 ms |
12384 KB |
Output is correct |
45 |
Correct |
100 ms |
15092 KB |
Output is correct |
46 |
Correct |
91 ms |
17444 KB |
Output is correct |
47 |
Correct |
132 ms |
19092 KB |
Output is correct |
48 |
Correct |
182 ms |
30724 KB |
Output is correct |
49 |
Correct |
187 ms |
30056 KB |
Output is correct |
50 |
Correct |
127 ms |
19724 KB |
Output is correct |
51 |
Correct |
125 ms |
19932 KB |
Output is correct |
52 |
Correct |
138 ms |
19672 KB |
Output is correct |
53 |
Correct |
178 ms |
18656 KB |
Output is correct |
54 |
Correct |
108 ms |
19132 KB |
Output is correct |
55 |
Correct |
21 ms |
3420 KB |
Output is correct |
56 |
Correct |
11 ms |
3164 KB |
Output is correct |
57 |
Correct |
86 ms |
11564 KB |
Output is correct |
58 |
Correct |
32 ms |
12240 KB |
Output is correct |
59 |
Correct |
2282 ms |
23388 KB |
Output is correct |
60 |
Execution timed out |
3011 ms |
43648 KB |
Time limit exceeded |
61 |
Halted |
0 ms |
0 KB |
- |