#include "race.h"
#include "bits/stdc++.h"
using namespace std;
#define fi first
#define se second
const int MAXN=200005;
typedef pair<int,int> pii;
long long pref[MAXN];
vector<pii> adj[MAXN];
int depth[MAXN],KK,ans=1e9;
map<long long,int> subtree[MAXN];
void merge(int now,int nxt){
for(map<long long,int>::iterator it=subtree[nxt].begin();it!=subtree[nxt].end();++it){
if(subtree[now].count(it->first))subtree[now][it->first]=min(subtree[now][it->first],it->second);
else subtree[now][it->first]=it->second;
}
}
void dfs(int now,int par){
subtree[now][pref[now]]=depth[now];
//hitung semua pasangan node yang LCAnya now
for(auto nxt : adj[now]){
if(nxt.fi==par)continue;
depth[nxt.fi]=depth[now]+1;
pref[nxt.fi]=pref[now]+nxt.se;
dfs(nxt.fi,now);
if(subtree[now].size()<subtree[nxt.fi].size())subtree[now].swap(subtree[nxt.fi]);
}
for(auto nxt : adj[now]){
if(nxt.fi==par)continue;
for(map<long long,int>::iterator it=subtree[nxt.fi].begin();it!=subtree[nxt.fi].end();++it){
int sisa=KK+2*pref[now]-it->first;
if(subtree[now].count(sisa)){
ans=min(ans,it->second+subtree[now][sisa]-2*depth[now]);
}
}
merge(now,nxt.fi);
}
}
int best_path(int N, int K, int H[][2], int L[])
{
KK=K;
for(int i=0;i<N-1;i++){
adj[H[i][0]].push_back({H[i][1],L[i]});
adj[H[i][1]].push_back({H[i][0],L[i]});
}
dfs(0,-1);
if(ans==1e9)ans=-1;
return ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 2 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 3 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 4 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 5 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 6 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 7 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14572 KB |
Output is correct |
| 9 |
Correct |
10 ms |
14572 KB |
Output is correct |
| 10 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 11 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 12 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 13 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 15 |
Correct |
12 ms |
14444 KB |
Output is correct |
| 16 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 17 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14444 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 2 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 3 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 4 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 5 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 6 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 7 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14572 KB |
Output is correct |
| 9 |
Correct |
10 ms |
14572 KB |
Output is correct |
| 10 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 11 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 12 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 13 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 15 |
Correct |
12 ms |
14444 KB |
Output is correct |
| 16 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 17 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 19 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 20 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 21 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 22 |
Correct |
12 ms |
14828 KB |
Output is correct |
| 23 |
Correct |
11 ms |
14696 KB |
Output is correct |
| 24 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 25 |
Correct |
12 ms |
14720 KB |
Output is correct |
| 26 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 27 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 28 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 29 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 30 |
Correct |
14 ms |
14700 KB |
Output is correct |
| 31 |
Correct |
13 ms |
14700 KB |
Output is correct |
| 32 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 33 |
Correct |
12 ms |
14828 KB |
Output is correct |
| 34 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 35 |
Correct |
13 ms |
14700 KB |
Output is correct |
| 36 |
Correct |
11 ms |
14732 KB |
Output is correct |
| 37 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 38 |
Correct |
11 ms |
14700 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 2 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 3 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 4 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 5 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 6 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 7 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14572 KB |
Output is correct |
| 9 |
Correct |
10 ms |
14572 KB |
Output is correct |
| 10 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 11 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 12 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 13 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 15 |
Correct |
12 ms |
14444 KB |
Output is correct |
| 16 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 17 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 19 |
Correct |
158 ms |
36452 KB |
Output is correct |
| 20 |
Correct |
159 ms |
36452 KB |
Output is correct |
| 21 |
Correct |
152 ms |
36324 KB |
Output is correct |
| 22 |
Correct |
165 ms |
36196 KB |
Output is correct |
| 23 |
Correct |
219 ms |
49444 KB |
Output is correct |
| 24 |
Correct |
171 ms |
40180 KB |
Output is correct |
| 25 |
Correct |
152 ms |
36452 KB |
Output is correct |
| 26 |
Correct |
76 ms |
43232 KB |
Output is correct |
| 27 |
Correct |
262 ms |
48612 KB |
Output is correct |
| 28 |
Correct |
384 ms |
84708 KB |
Output is correct |
| 29 |
Correct |
378 ms |
83428 KB |
Output is correct |
| 30 |
Correct |
250 ms |
48868 KB |
Output is correct |
| 31 |
Correct |
254 ms |
48868 KB |
Output is correct |
| 32 |
Correct |
342 ms |
48740 KB |
Output is correct |
| 33 |
Correct |
321 ms |
53600 KB |
Output is correct |
| 34 |
Correct |
437 ms |
86500 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 2 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 3 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 4 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 5 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 6 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 7 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14572 KB |
Output is correct |
| 9 |
Correct |
10 ms |
14572 KB |
Output is correct |
| 10 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 11 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 12 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 13 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 15 |
Correct |
12 ms |
14444 KB |
Output is correct |
| 16 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 17 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 19 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 20 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 21 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 22 |
Correct |
12 ms |
14828 KB |
Output is correct |
| 23 |
Correct |
11 ms |
14696 KB |
Output is correct |
| 24 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 25 |
Correct |
12 ms |
14720 KB |
Output is correct |
| 26 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 27 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 28 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 29 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 30 |
Correct |
14 ms |
14700 KB |
Output is correct |
| 31 |
Correct |
13 ms |
14700 KB |
Output is correct |
| 32 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 33 |
Correct |
12 ms |
14828 KB |
Output is correct |
| 34 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 35 |
Correct |
13 ms |
14700 KB |
Output is correct |
| 36 |
Correct |
11 ms |
14732 KB |
Output is correct |
| 37 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 38 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 39 |
Correct |
158 ms |
36452 KB |
Output is correct |
| 40 |
Correct |
159 ms |
36452 KB |
Output is correct |
| 41 |
Correct |
152 ms |
36324 KB |
Output is correct |
| 42 |
Correct |
165 ms |
36196 KB |
Output is correct |
| 43 |
Correct |
219 ms |
49444 KB |
Output is correct |
| 44 |
Correct |
171 ms |
40180 KB |
Output is correct |
| 45 |
Correct |
152 ms |
36452 KB |
Output is correct |
| 46 |
Correct |
76 ms |
43232 KB |
Output is correct |
| 47 |
Correct |
262 ms |
48612 KB |
Output is correct |
| 48 |
Correct |
384 ms |
84708 KB |
Output is correct |
| 49 |
Correct |
378 ms |
83428 KB |
Output is correct |
| 50 |
Correct |
250 ms |
48868 KB |
Output is correct |
| 51 |
Correct |
254 ms |
48868 KB |
Output is correct |
| 52 |
Correct |
342 ms |
48740 KB |
Output is correct |
| 53 |
Correct |
321 ms |
53600 KB |
Output is correct |
| 54 |
Correct |
437 ms |
86500 KB |
Output is correct |
| 55 |
Correct |
29 ms |
17644 KB |
Output is correct |
| 56 |
Correct |
19 ms |
16364 KB |
Output is correct |
| 57 |
Correct |
101 ms |
34404 KB |
Output is correct |
| 58 |
Correct |
69 ms |
27992 KB |
Output is correct |
| 59 |
Correct |
116 ms |
49636 KB |
Output is correct |
| 60 |
Correct |
387 ms |
83684 KB |
Output is correct |
| 61 |
Correct |
310 ms |
52232 KB |
Output is correct |
| 62 |
Correct |
297 ms |
48740 KB |
Output is correct |
| 63 |
Correct |
369 ms |
48740 KB |
Output is correct |
| 64 |
Correct |
560 ms |
100452 KB |
Output is correct |
| 65 |
Correct |
577 ms |
100328 KB |
Output is correct |
| 66 |
Correct |
397 ms |
80516 KB |
Output is correct |
| 67 |
Correct |
228 ms |
43288 KB |
Output is correct |
| 68 |
Correct |
460 ms |
65380 KB |
Output is correct |
| 69 |
Correct |
461 ms |
65992 KB |
Output is correct |
| 70 |
Correct |
440 ms |
63332 KB |
Output is correct |
