oj.uz

Submission #964519

# Submission time Handle Problem Language Result Execution time Memory
964519 2024-04-17T05:02:31 Z UmairAhmadMirza Race (IOI11_race) C++14
100 / 100
 723 ms 43380 KB 
#include <bits/stdc++.h>
using namespace std;
int const MN=200005;
map<int,int> cnt;
vector<pair<int,int>> adj[MN];
int sz[MN];
int n,k;
int ans=MN;
void dfs_sz(int node,int par=-1){
	sz[node]=1;
	for(auto i:adj[node])
		if(i.first!=par){
			dfs_sz(i.first,node);
			sz[node]+=sz[i.first];
		}
}
int total=0;
int find_centroid(int node){
	for(auto i:adj[node]){
		if(sz[i.first]*2>total){
			sz[node]-=sz[i.first];
			sz[i.first]+=sz[node];
			return find_centroid(i.first);
		}
	}
	return node;
}
void dfs(int node,int par,int w,int dep){
	if(w==k)
		ans=min(ans,dep);
	if(w>=k)
		return;
	if(cnt.find(k-w)!=cnt.end())
		ans=min(ans,cnt[k-w]+dep);
	for(auto i:adj[node])
		if(sz[i.first]!=-1 && i.first!=par)
			dfs(i.first,node,w+i.second,dep+1);
}
void update(int node,int par,int w,int dep){
	if(w>=k)
		return;
	if(cnt[w]==0 || cnt[w]>dep)
		cnt[w]=dep;
	for(auto i:adj[node])
		if(sz[i.first]!=-1 && i.first!=par)
			update(i.first,node,w+i.second,dep+1);
}
void solve(int node){
	total=sz[node];
	node=find_centroid(node);
	sz[node]=-1;
	// cout<<node<<endl;
	for(auto i:adj[node]){
		if(sz[i.first]==-1)
			continue;
		dfs(i.first,-1,i.second,1);
		update(i.first,-1,i.second,1);
	}
	cnt.clear();
	// cout<<ans<<endl;
	for(auto i:adj[node])
		if(sz[i.first]!=-1)
			solve(i.first);
}
int best_path(int N, int K, int H[][2], int L[]){
	n=N;
	k=K;
	total=n;
	for (int i = 0; i < n-1; ++i)
	{
		int u=H[i][0];
		int v=H[i][1];
		adj[u].push_back({v,L[i]});
		adj[v].push_back({u,L[i]});
	}
	dfs_sz(0);
	solve(0);
	if(ans==MN)
		ans=-1;
	return ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9564 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9560 KB Output is correct
5 Correct 2 ms 9568 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9548 KB Output is correct
8 Correct 2 ms 9560 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9560 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9568 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9568 KB Output is correct
16 Correct 3 ms 9564 KB Output is correct
17 Correct 3 ms 9564 KB Output is correct
18 Correct 2 ms 10072 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9564 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9560 KB Output is correct
5 Correct 2 ms 9568 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9548 KB Output is correct
8 Correct 2 ms 9560 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9560 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9568 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9568 KB Output is correct
16 Correct 3 ms 9564 KB Output is correct
17 Correct 3 ms 9564 KB Output is correct
18 Correct 2 ms 10072 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9560 KB Output is correct
21 Correct 3 ms 9560 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 2 ms 9560 KB Output is correct
24 Correct 4 ms 9564 KB Output is correct
25 Correct 3 ms 9564 KB Output is correct
26 Correct 4 ms 9576 KB Output is correct
27 Correct 2 ms 9564 KB Output is correct
28 Correct 3 ms 9564 KB Output is correct
29 Correct 3 ms 9564 KB Output is correct
30 Correct 3 ms 9564 KB Output is correct
31 Correct 3 ms 9564 KB Output is correct
32 Correct 3 ms 9564 KB Output is correct
33 Correct 3 ms 9652 KB Output is correct
34 Correct 3 ms 9564 KB Output is correct
35 Correct 3 ms 9564 KB Output is correct
36 Correct 3 ms 9560 KB Output is correct
37 Correct 3 ms 9560 KB Output is correct
38 Correct 3 ms 9564 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9564 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9560 KB Output is correct
5 Correct 2 ms 9568 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9548 KB Output is correct
8 Correct 2 ms 9560 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9560 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9568 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9568 KB Output is correct
16 Correct 3 ms 9564 KB Output is correct
17 Correct 3 ms 9564 KB Output is correct
18 Correct 2 ms 10072 KB Output is correct
19 Correct 131 ms 15548 KB Output is correct
20 Correct 118 ms 16308 KB Output is correct
21 Correct 137 ms 16180 KB Output is correct
22 Correct 143 ms 16720 KB Output is correct
23 Correct 52 ms 17112 KB Output is correct
24 Correct 50 ms 16880 KB Output is correct
25 Correct 84 ms 20220 KB Output is correct
26 Correct 73 ms 23420 KB Output is correct
27 Correct 153 ms 20916 KB Output is correct
28 Correct 142 ms 35312 KB Output is correct
29 Correct 119 ms 34376 KB Output is correct
30 Correct 133 ms 21300 KB Output is correct
31 Correct 125 ms 21532 KB Output is correct
32 Correct 160 ms 21224 KB Output is correct
33 Correct 160 ms 20480 KB Output is correct
34 Correct 80 ms 20560 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9564 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9560 KB Output is correct
5 Correct 2 ms 9568 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9548 KB Output is correct
8 Correct 2 ms 9560 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9560 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9568 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9568 KB Output is correct
16 Correct 3 ms 9564 KB Output is correct
17 Correct 3 ms 9564 KB Output is correct
18 Correct 2 ms 10072 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9560 KB Output is correct
21 Correct 3 ms 9560 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 2 ms 9560 KB Output is correct
24 Correct 4 ms 9564 KB Output is correct
25 Correct 3 ms 9564 KB Output is correct
26 Correct 4 ms 9576 KB Output is correct
27 Correct 2 ms 9564 KB Output is correct
28 Correct 3 ms 9564 KB Output is correct
29 Correct 3 ms 9564 KB Output is correct
30 Correct 3 ms 9564 KB Output is correct
31 Correct 3 ms 9564 KB Output is correct
32 Correct 3 ms 9564 KB Output is correct
33 Correct 3 ms 9652 KB Output is correct
34 Correct 3 ms 9564 KB Output is correct
35 Correct 3 ms 9564 KB Output is correct
36 Correct 3 ms 9560 KB Output is correct
37 Correct 3 ms 9560 KB Output is correct
38 Correct 3 ms 9564 KB Output is correct
39 Correct 131 ms 15548 KB Output is correct
40 Correct 118 ms 16308 KB Output is correct
41 Correct 137 ms 16180 KB Output is correct
42 Correct 143 ms 16720 KB Output is correct
43 Correct 52 ms 17112 KB Output is correct
44 Correct 50 ms 16880 KB Output is correct
45 Correct 84 ms 20220 KB Output is correct
46 Correct 73 ms 23420 KB Output is correct
47 Correct 153 ms 20916 KB Output is correct
48 Correct 142 ms 35312 KB Output is correct
49 Correct 119 ms 34376 KB Output is correct
50 Correct 133 ms 21300 KB Output is correct
51 Correct 125 ms 21532 KB Output is correct
52 Correct 160 ms 21224 KB Output is correct
53 Correct 160 ms 20480 KB Output is correct
54 Correct 80 ms 20560 KB Output is correct
55 Correct 17 ms 10076 KB Output is correct
56 Correct 14 ms 9816 KB Output is correct
57 Correct 104 ms 15868 KB Output is correct
58 Correct 38 ms 17104 KB Output is correct
59 Correct 212 ms 27108 KB Output is correct
60 Correct 723 ms 43380 KB Output is correct
61 Correct 200 ms 20972 KB Output is correct
62 Correct 206 ms 21568 KB Output is correct
63 Correct 238 ms 21752 KB Output is correct
64 Correct 619 ms 24656 KB Output is correct
65 Correct 89 ms 22352 KB Output is correct
66 Correct 357 ms 30036 KB Output is correct
67 Correct 89 ms 22956 KB Output is correct
68 Correct 301 ms 25172 KB Output is correct
69 Correct 301 ms 23048 KB Output is correct
70 Correct 253 ms 25400 KB Output is correct