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Submission #1068431

# Submission time Handle Problem Language Result Execution time Memory
1068431 2024-08-21T09:51:30 Z apper Race (IOI11_race) C++17
21 / 100
 3000 ms 33876 KB 
#include "race.h"

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define ll long long 
#define pb push_back
using namespace std;
using namespace __gnu_pbds;
/*------------------------------------code------------------------------------*/
const ll MAXN=1e5+9;
const ll INF=1e9+9;
const ll R=(1<<18);
const int X=18;
//const ll M=1e9+7;
//const ll P=47;

int n, k;
vector<pair<int, int>> adj[MAXN];
vector<int> sz(MAXN);
vector<int> done(MAXN);
int ans=INF, curr;
vector<int> dist[10*MAXN];
vector<int> deg(MAXN);
vector<int> group(MAXN);

int dfs(int v, int p)
{
	sz[v]=1;
	for(auto [u, w] : adj[v])
	{
		if(u==p || done[u])
			continue;
		sz[v]+=dfs(u, v);
	}
	return sz[v];
}

int get(int v, int p, int mx)
{
	for(auto [u, w] : adj[v])
	{
		if(u==p || done[u])
			continue;
		if(sz[u]>mx)
			return get(u, v, mx);
	}
	return v;
}

void mark(int v, int p, ll d)
{
	dist[d].pb(v);
	group[v]=curr;
	deg[v]=deg[p]+1;
	for(auto [u, w] : adj[v])
	{
		if(u==p || done[u] || d+w>k || deg[v]>=ans)
			continue;
		mark(u, v, d+w);
	}
}

void solve(int v, int p, ll d)
{
	if(d==k)
	{
		ans=min(ans, deg[v]);
		return;
	}
	for(int u : dist[k-d])
		if(group[u]!=group[v])
			ans=min(ans, deg[v]+deg[u]);
	for(auto [u, w] : adj[v])
	{
		if(u==p || done[u] || d+w>k || deg[v]>=ans)
			continue;
		solve(u, v, d+w);
	}
}

void cls(int v, int p, ll d)
{
	group[v]=0;
	dist[d].clear();
	deg[v]=0;
	for(auto [u, w] : adj[v])
		if(group[u])
			cls(u, v, d+w);
}

void decompose(int v)
{
	int c = get(v, -1, dfs(v, -1)/2);
	done[c]=true;
	deg[c]=0;
	curr=1;
	for(auto [u, w] : adj[c])
	{
		if(done[u] || w>k)
			continue;
		mark(u, c, w);
		curr++;
	}
	for(auto [u, w] : adj[c])
	{
		if(done[u] || w>k)
			continue;
		solve(u, c, w);
	}
	
	
	for(int i=0;i<=k;i++)
		dist[i].clear();
	for(int i=0;i<=n;i++)
		group[i]=deg[i]=0;
		
		
	/*
	for(auto [u, w] : adj[c])
		if(!done[u] && w<=k)
			cls(u, v, w);
	*/
	for(auto [u, w] : adj[c])
		if(!done[u])	
			decompose(u);
}

int best_path(int N, int K, int edges[][2], int weights[]) 
{
	if(k==1) 
		return 0;
	n=N;
	k=K;
	for(int i=0;i<n-1;i++)
	{
		int u = edges[i][0];
		int v = edges[i][1];
		adj[u].pb({v, weights[i]});
		adj[v].pb({u, weights[i]});
	}
	decompose(1);
	return (ans==INF ? -1 : ans);
}

/*
int main()
{
    cin.tie(0); ios_base::sync_with_stdio(0);
	solve();
	return 0;
}
*/

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 27740 KB Output is correct
2 Correct 14 ms 27740 KB Output is correct
3 Correct 12 ms 27860 KB Output is correct
4 Correct 12 ms 27736 KB Output is correct
5 Correct 12 ms 27740 KB Output is correct
6 Correct 12 ms 27784 KB Output is correct
7 Correct 12 ms 27740 KB Output is correct
8 Correct 11 ms 27736 KB Output is correct
9 Correct 13 ms 27740 KB Output is correct
10 Correct 12 ms 27740 KB Output is correct
11 Correct 12 ms 27740 KB Output is correct
12 Correct 13 ms 27736 KB Output is correct
13 Correct 11 ms 27844 KB Output is correct
14 Correct 13 ms 27740 KB Output is correct
15 Correct 14 ms 27736 KB Output is correct
16 Correct 11 ms 27740 KB Output is correct
17 Correct 12 ms 27700 KB Output is correct
18 Correct 12 ms 27736 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 27740 KB Output is correct
2 Correct 14 ms 27740 KB Output is correct
3 Correct 12 ms 27860 KB Output is correct
4 Correct 12 ms 27736 KB Output is correct
5 Correct 12 ms 27740 KB Output is correct
6 Correct 12 ms 27784 KB Output is correct
7 Correct 12 ms 27740 KB Output is correct
8 Correct 11 ms 27736 KB Output is correct
9 Correct 13 ms 27740 KB Output is correct
10 Correct 12 ms 27740 KB Output is correct
11 Correct 12 ms 27740 KB Output is correct
12 Correct 13 ms 27736 KB Output is correct
13 Correct 11 ms 27844 KB Output is correct
14 Correct 13 ms 27740 KB Output is correct
15 Correct 14 ms 27736 KB Output is correct
16 Correct 11 ms 27740 KB Output is correct
17 Correct 12 ms 27700 KB Output is correct
18 Correct 12 ms 27736 KB Output is correct
19 Correct 12 ms 27740 KB Output is correct
20 Correct 12 ms 27724 KB Output is correct
21 Correct 13 ms 27740 KB Output is correct
22 Correct 767 ms 28168 KB Output is correct
23 Correct 656 ms 27984 KB Output is correct
24 Correct 790 ms 27740 KB Output is correct
25 Correct 755 ms 28248 KB Output is correct
26 Correct 268 ms 27932 KB Output is correct
27 Correct 733 ms 27880 KB Output is correct
28 Correct 154 ms 27984 KB Output is correct
29 Correct 231 ms 27948 KB Output is correct
30 Correct 276 ms 27984 KB Output is correct
31 Correct 472 ms 28004 KB Output is correct
32 Correct 570 ms 27988 KB Output is correct
33 Correct 628 ms 27984 KB Output is correct
34 Correct 411 ms 27988 KB Output is correct
35 Correct 581 ms 27984 KB Output is correct
36 Correct 634 ms 27988 KB Output is correct
37 Correct 535 ms 27984 KB Output is correct
38 Correct 332 ms 27972 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 27740 KB Output is correct
2 Correct 14 ms 27740 KB Output is correct
3 Correct 12 ms 27860 KB Output is correct
4 Correct 12 ms 27736 KB Output is correct
5 Correct 12 ms 27740 KB Output is correct
6 Correct 12 ms 27784 KB Output is correct
7 Correct 12 ms 27740 KB Output is correct
8 Correct 11 ms 27736 KB Output is correct
9 Correct 13 ms 27740 KB Output is correct
10 Correct 12 ms 27740 KB Output is correct
11 Correct 12 ms 27740 KB Output is correct
12 Correct 13 ms 27736 KB Output is correct
13 Correct 11 ms 27844 KB Output is correct
14 Correct 13 ms 27740 KB Output is correct
15 Correct 14 ms 27736 KB Output is correct
16 Correct 11 ms 27740 KB Output is correct
17 Correct 12 ms 27700 KB Output is correct
18 Correct 12 ms 27736 KB Output is correct
19 Execution timed out 3035 ms 33876 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 27740 KB Output is correct
2 Correct 14 ms 27740 KB Output is correct
3 Correct 12 ms 27860 KB Output is correct
4 Correct 12 ms 27736 KB Output is correct
5 Correct 12 ms 27740 KB Output is correct
6 Correct 12 ms 27784 KB Output is correct
7 Correct 12 ms 27740 KB Output is correct
8 Correct 11 ms 27736 KB Output is correct
9 Correct 13 ms 27740 KB Output is correct
10 Correct 12 ms 27740 KB Output is correct
11 Correct 12 ms 27740 KB Output is correct
12 Correct 13 ms 27736 KB Output is correct
13 Correct 11 ms 27844 KB Output is correct
14 Correct 13 ms 27740 KB Output is correct
15 Correct 14 ms 27736 KB Output is correct
16 Correct 11 ms 27740 KB Output is correct
17 Correct 12 ms 27700 KB Output is correct
18 Correct 12 ms 27736 KB Output is correct
19 Correct 12 ms 27740 KB Output is correct
20 Correct 12 ms 27724 KB Output is correct
21 Correct 13 ms 27740 KB Output is correct
22 Correct 767 ms 28168 KB Output is correct
23 Correct 656 ms 27984 KB Output is correct
24 Correct 790 ms 27740 KB Output is correct
25 Correct 755 ms 28248 KB Output is correct
26 Correct 268 ms 27932 KB Output is correct
27 Correct 733 ms 27880 KB Output is correct
28 Correct 154 ms 27984 KB Output is correct
29 Correct 231 ms 27948 KB Output is correct
30 Correct 276 ms 27984 KB Output is correct
31 Correct 472 ms 28004 KB Output is correct
32 Correct 570 ms 27988 KB Output is correct
33 Correct 628 ms 27984 KB Output is correct
34 Correct 411 ms 27988 KB Output is correct
35 Correct 581 ms 27984 KB Output is correct
36 Correct 634 ms 27988 KB Output is correct
37 Correct 535 ms 27984 KB Output is correct
38 Correct 332 ms 27972 KB Output is correct
39 Execution timed out 3035 ms 33876 KB Time limit exceeded
40 Halted 0 ms 0 KB -