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Submission #402470

# Submission time Handle Problem Language Result Execution time Memory
402470 2021-05-11T18:22:59 Z Jasiekstrz Race (IOI11_race) C++17
100 / 100
 1829 ms 56388 KB 
#include<bits/stdc++.h>
#include "race.h"
#define fi first
#define se second
using namespace std;
const int NN=2e5;
const int INF=1e9+7;
struct Poss
{
	int val[2],g[2];
	Poss()
	{
		val[0]=val[1]=INF;
		g[0]=g[1]=0;
	}
	void operator+=(pair<int,int> oth)
	{
		int vv=oth.fi,gg=oth.se;
		if(vv<val[0] && g[0]!=gg)
		{
			val[1]=val[0];
			g[1]=g[0];
			val[0]=vv;
			g[0]=gg;
		}
		else if(vv<val[0])
			val[0]=vv;
		else if(vv<val[1] && g[0]!=gg)
		{
			val[1]=vv;
			g[1]=gg;
		}
		return;
	}
	int get(int x)
	{
		return (x==g[0] ? val[1]:val[0]);
	}
};
int k;
vector<pair<int,int>> e[NN+10];
bool vis[NN+10];
int siz[NN+10];
map<int,Poss> mp;
void dfs_siz(int x,int p)
{
	siz[x]=1;
	for(auto v:e[x])
	{
		if(!vis[v.fi] && v.fi!=p)
		{
			dfs_siz(v.fi,x);
			siz[x]+=siz[v.fi];
		}
	}
	return;
}
int centro(int x,int p,int s_all)
{
	for(auto v:e[x])
	{
		if(vis[v.fi] || v.fi==p)
			continue;
		int c=centro(v.fi,x,s_all);
		if(c!=-1)
			return c;
	}
	if(2*siz[x]>=s_all)
		return x;
	return -1;
}
int dfs(int x,int p,int d1,int d2,int id)
{
	int ans=INF;
	ans=min(ans,d2+mp[k-d1].get(id));
	mp[d1]+=make_pair(d2,id);
	for(auto v:e[x])
	{
		if(vis[v.fi] || v.fi==p)
			continue;
		ans=min(ans,dfs(v.fi,x,min(INF,d1+v.se),d2+1,id));
	}
	return ans;
}
int solve(int x)
{
	int ans=INF;
	dfs_siz(x,-1);
	x=centro(x,-1,siz[x]);
	vis[x]=true;
	mp.clear();
	mp[0]+=make_pair(0,x);
	for(auto v:e[x])
	{
		if(!vis[v.fi])
			ans=min(ans,dfs(v.fi,x,v.se,1,v.fi));
	}
	for(auto v:e[x])
	{
		if(!vis[v.fi])
			ans=min(ans,solve(v.fi));
	}
	return ans;
}
int best_path(int N,int K,int H[][2],int L[])
{
	k=K;
	for(int i=0;i<N-1;i++)
	{
		e[H[i][0]].push_back({H[i][1],L[i]});
		e[H[i][1]].push_back({H[i][0],L[i]});
	}
	int ans=solve(0);
	return (ans>=INF ? -1:ans);
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 5024 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 4 ms 4940 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 5024 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 4 ms 4940 KB Output is correct
19 Correct 4 ms 4940 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 5 ms 5008 KB Output is correct
22 Correct 6 ms 5140 KB Output is correct
23 Correct 6 ms 5196 KB Output is correct
24 Correct 6 ms 5196 KB Output is correct
25 Correct 5 ms 5196 KB Output is correct
26 Correct 5 ms 5196 KB Output is correct
27 Correct 5 ms 5068 KB Output is correct
28 Correct 6 ms 5140 KB Output is correct
29 Correct 6 ms 5140 KB Output is correct
30 Correct 6 ms 5196 KB Output is correct
31 Correct 6 ms 5196 KB Output is correct
32 Correct 6 ms 5192 KB Output is correct
33 Correct 6 ms 5196 KB Output is correct
34 Correct 7 ms 5196 KB Output is correct
35 Correct 7 ms 5196 KB Output is correct
36 Correct 6 ms 5196 KB Output is correct
37 Correct 5 ms 5188 KB Output is correct
38 Correct 6 ms 5196 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 5024 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 4 ms 4940 KB Output is correct
19 Correct 283 ms 11692 KB Output is correct
20 Correct 277 ms 11584 KB Output is correct
21 Correct 277 ms 11700 KB Output is correct
22 Correct 236 ms 11792 KB Output is correct
23 Correct 384 ms 12076 KB Output is correct
24 Correct 172 ms 11800 KB Output is correct
25 Correct 254 ms 17992 KB Output is correct
26 Correct 115 ms 18936 KB Output is correct
27 Correct 432 ms 17732 KB Output is correct
28 Correct 1778 ms 56388 KB Output is correct
29 Correct 1746 ms 55288 KB Output is correct
30 Correct 404 ms 17612 KB Output is correct
31 Correct 397 ms 17728 KB Output is correct
32 Correct 523 ms 17712 KB Output is correct
33 Correct 574 ms 16468 KB Output is correct
34 Correct 1632 ms 40864 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 4 ms 4940 KB Output is correct
12 Correct 4 ms 4940 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 5024 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 4 ms 4940 KB Output is correct
18 Correct 4 ms 4940 KB Output is correct
19 Correct 4 ms 4940 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 5 ms 5008 KB Output is correct
22 Correct 6 ms 5140 KB Output is correct
23 Correct 6 ms 5196 KB Output is correct
24 Correct 6 ms 5196 KB Output is correct
25 Correct 5 ms 5196 KB Output is correct
26 Correct 5 ms 5196 KB Output is correct
27 Correct 5 ms 5068 KB Output is correct
28 Correct 6 ms 5140 KB Output is correct
29 Correct 6 ms 5140 KB Output is correct
30 Correct 6 ms 5196 KB Output is correct
31 Correct 6 ms 5196 KB Output is correct
32 Correct 6 ms 5192 KB Output is correct
33 Correct 6 ms 5196 KB Output is correct
34 Correct 7 ms 5196 KB Output is correct
35 Correct 7 ms 5196 KB Output is correct
36 Correct 6 ms 5196 KB Output is correct
37 Correct 5 ms 5188 KB Output is correct
38 Correct 6 ms 5196 KB Output is correct
39 Correct 283 ms 11692 KB Output is correct
40 Correct 277 ms 11584 KB Output is correct
41 Correct 277 ms 11700 KB Output is correct
42 Correct 236 ms 11792 KB Output is correct
43 Correct 384 ms 12076 KB Output is correct
44 Correct 172 ms 11800 KB Output is correct
45 Correct 254 ms 17992 KB Output is correct
46 Correct 115 ms 18936 KB Output is correct
47 Correct 432 ms 17732 KB Output is correct
48 Correct 1778 ms 56388 KB Output is correct
49 Correct 1746 ms 55288 KB Output is correct
50 Correct 404 ms 17612 KB Output is correct
51 Correct 397 ms 17728 KB Output is correct
52 Correct 523 ms 17712 KB Output is correct
53 Correct 574 ms 16468 KB Output is correct
54 Correct 1632 ms 40864 KB Output is correct
55 Correct 40 ms 6304 KB Output is correct
56 Correct 21 ms 5660 KB Output is correct
57 Correct 172 ms 11980 KB Output is correct
58 Correct 51 ms 11532 KB Output is correct
59 Correct 492 ms 27772 KB Output is correct
60 Correct 1680 ms 52628 KB Output is correct
61 Correct 496 ms 20708 KB Output is correct
62 Correct 397 ms 17680 KB Output is correct
63 Correct 505 ms 17708 KB Output is correct
64 Correct 1690 ms 29132 KB Output is correct
65 Correct 1540 ms 41864 KB Output is correct
66 Correct 1829 ms 53444 KB Output is correct
67 Correct 165 ms 17656 KB Output is correct
68 Correct 802 ms 38660 KB Output is correct
69 Correct 832 ms 38872 KB Output is correct
70 Correct 789 ms 37124 KB Output is correct