oj.uz

Submission #797773

# Submission time Handle Problem Language Result Execution time Memory
797773 2023-07-29T21:34:44 Z ttamx Race (IOI11_race) C++14
100 / 100
 221 ms 35084 KB 
#include "race.h"
#include<bits/stdc++.h>

using namespace std;

typedef pair<int,int> p2;

const int N=2e5+5;
const int K=1e6+5;

int n,k;
int ans;
vector<p2> adj[N];
int sz[N];
bool used[N];
int dist[K];
vector<int> res;
vector<p2> res2;

int dfssz(int u,int p=-1){
	sz[u]=1;
	for(auto [v,w]:adj[u])if(v!=p&&!used[v])sz[u]+=dfssz(v,u);
	return sz[u];
}

int centroid(int u,int cnt,int p=-1){
	for(auto [v,w]:adj[u])if(v!=p&&!used[v]&&sz[v]*2>cnt)return centroid(v,cnt,u);
	return u;
}

void dfs(int u,int d,int cnt,int p=-1){
	if(d>k)return;
	res.emplace_back(d);
	res2.emplace_back(d,cnt);
	ans=min(ans,cnt+dist[k-d]);
	for(auto [v,w]:adj[u])if(v!=p&&!used[v])dfs(v,d+w,cnt+1,u);
}

void decom(int u){
	u=centroid(u,dfssz(u));
	used[u]=true;
	for(auto [v,w]:adj[u]){
		if(used[v])continue;
		dfs(v,w,1,u);
		for(auto [x,y]:res2)dist[x]=min(dist[x],y);
		res2.clear();
	}
	for(auto i:res)dist[i]=n;
	res.clear();
	for(auto [v,w]:adj[u])if(!used[v])decom(v);
}

int best_path(int N, int K, int H[][2], int L[]){
	n=N,k=K;
	ans=n;
	for(int i=1;i<=k;i++)dist[i]=n;
	for(int i=0;i<n-1;i++){
		int u=H[i][0],v=H[i][1],w=L[i];
		adj[u].emplace_back(v,w);
		adj[v].emplace_back(u,w);
	}
	decom(0);
	return (ans==n?-1:ans);
}

Compilation message

race.cpp: In function 'int dfssz(int, int)':
race.cpp:22:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   22 |  for(auto [v,w]:adj[u])if(v!=p&&!used[v])sz[u]+=dfssz(v,u);
      |           ^
race.cpp: In function 'int centroid(int, int, int)':
race.cpp:27:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   27 |  for(auto [v,w]:adj[u])if(v!=p&&!used[v]&&sz[v]*2>cnt)return centroid(v,cnt,u);
      |           ^
race.cpp: In function 'void dfs(int, int, int, int)':
race.cpp:36:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   36 |  for(auto [v,w]:adj[u])if(v!=p&&!used[v])dfs(v,d+w,cnt+1,u);
      |           ^
race.cpp: In function 'void decom(int)':
race.cpp:42:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   42 |  for(auto [v,w]:adj[u]){
      |           ^
race.cpp:45:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   45 |   for(auto [x,y]:res2)dist[x]=min(dist[x],y);
      |            ^
race.cpp:50:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   50 |  for(auto [v,w]:adj[u])if(!used[v])decom(v);
      |           ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 5012 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 5016 KB Output is correct
12 Correct 2 ms 5016 KB Output is correct
13 Correct 2 ms 5016 KB Output is correct
14 Correct 2 ms 4944 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 3 ms 5036 KB Output is correct
17 Correct 3 ms 5012 KB Output is correct
18 Correct 2 ms 5020 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 5012 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 5016 KB Output is correct
12 Correct 2 ms 5016 KB Output is correct
13 Correct 2 ms 5016 KB Output is correct
14 Correct 2 ms 4944 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 3 ms 5036 KB Output is correct
17 Correct 3 ms 5012 KB Output is correct
18 Correct 2 ms 5020 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 4 ms 8660 KB Output is correct
23 Correct 4 ms 8020 KB Output is correct
24 Correct 6 ms 8404 KB Output is correct
25 Correct 4 ms 8404 KB Output is correct
26 Correct 3 ms 6356 KB Output is correct
27 Correct 4 ms 8228 KB Output is correct
28 Correct 3 ms 5888 KB Output is correct
29 Correct 3 ms 6356 KB Output is correct
30 Correct 4 ms 6436 KB Output is correct
31 Correct 4 ms 7636 KB Output is correct
32 Correct 4 ms 7892 KB Output is correct
33 Correct 4 ms 8096 KB Output is correct
34 Correct 4 ms 7380 KB Output is correct
35 Correct 4 ms 8276 KB Output is correct
36 Correct 4 ms 8660 KB Output is correct
37 Correct 4 ms 8148 KB Output is correct
38 Correct 3 ms 7068 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 5012 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 5016 KB Output is correct
12 Correct 2 ms 5016 KB Output is correct
13 Correct 2 ms 5016 KB Output is correct
14 Correct 2 ms 4944 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 3 ms 5036 KB Output is correct
17 Correct 3 ms 5012 KB Output is correct
18 Correct 2 ms 5020 KB Output is correct
19 Correct 66 ms 11808 KB Output is correct
20 Correct 75 ms 11872 KB Output is correct
21 Correct 71 ms 12140 KB Output is correct
22 Correct 66 ms 12556 KB Output is correct
23 Correct 46 ms 11980 KB Output is correct
24 Correct 35 ms 11872 KB Output is correct
25 Correct 78 ms 14512 KB Output is correct
26 Correct 63 ms 18396 KB Output is correct
27 Correct 96 ms 18776 KB Output is correct
28 Correct 152 ms 30152 KB Output is correct
29 Correct 150 ms 29144 KB Output is correct
30 Correct 96 ms 18852 KB Output is correct
31 Correct 96 ms 18760 KB Output is correct
32 Correct 117 ms 18936 KB Output is correct
33 Correct 118 ms 17560 KB Output is correct
34 Correct 107 ms 18508 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 5012 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 3 ms 5016 KB Output is correct
12 Correct 2 ms 5016 KB Output is correct
13 Correct 2 ms 5016 KB Output is correct
14 Correct 2 ms 4944 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 3 ms 5036 KB Output is correct
17 Correct 3 ms 5012 KB Output is correct
18 Correct 2 ms 5020 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 5076 KB Output is correct
22 Correct 4 ms 8660 KB Output is correct
23 Correct 4 ms 8020 KB Output is correct
24 Correct 6 ms 8404 KB Output is correct
25 Correct 4 ms 8404 KB Output is correct
26 Correct 3 ms 6356 KB Output is correct
27 Correct 4 ms 8228 KB Output is correct
28 Correct 3 ms 5888 KB Output is correct
29 Correct 3 ms 6356 KB Output is correct
30 Correct 4 ms 6436 KB Output is correct
31 Correct 4 ms 7636 KB Output is correct
32 Correct 4 ms 7892 KB Output is correct
33 Correct 4 ms 8096 KB Output is correct
34 Correct 4 ms 7380 KB Output is correct
35 Correct 4 ms 8276 KB Output is correct
36 Correct 4 ms 8660 KB Output is correct
37 Correct 4 ms 8148 KB Output is correct
38 Correct 3 ms 7068 KB Output is correct
39 Correct 66 ms 11808 KB Output is correct
40 Correct 75 ms 11872 KB Output is correct
41 Correct 71 ms 12140 KB Output is correct
42 Correct 66 ms 12556 KB Output is correct
43 Correct 46 ms 11980 KB Output is correct
44 Correct 35 ms 11872 KB Output is correct
45 Correct 78 ms 14512 KB Output is correct
46 Correct 63 ms 18396 KB Output is correct
47 Correct 96 ms 18776 KB Output is correct
48 Correct 152 ms 30152 KB Output is correct
49 Correct 150 ms 29144 KB Output is correct
50 Correct 96 ms 18852 KB Output is correct
51 Correct 96 ms 18760 KB Output is correct
52 Correct 117 ms 18936 KB Output is correct
53 Correct 118 ms 17560 KB Output is correct
54 Correct 107 ms 18508 KB Output is correct
55 Correct 7 ms 5716 KB Output is correct
56 Correct 9 ms 5852 KB Output is correct
57 Correct 47 ms 12740 KB Output is correct
58 Correct 28 ms 12552 KB Output is correct
59 Correct 57 ms 19100 KB Output is correct
60 Correct 221 ms 35084 KB Output is correct
61 Correct 103 ms 19176 KB Output is correct
62 Correct 117 ms 23816 KB Output is correct
63 Correct 139 ms 23720 KB Output is correct
64 Correct 211 ms 22808 KB Output is correct
65 Correct 115 ms 19608 KB Output is correct
66 Correct 213 ms 31312 KB Output is correct
67 Correct 68 ms 25220 KB Output is correct
68 Correct 142 ms 23960 KB Output is correct
69 Correct 144 ms 24144 KB Output is correct
70 Correct 128 ms 23368 KB Output is correct