Submission #430750

#	Time	Username	Problem	Language	Result	Execution time	Memory
430750		JUANDI321	Stations (IOI20_stations)	C++17	0 / 100	811 ms	704 KiB

stations

#include "stations.h"
#include <vector>
#include <iostream>
#include <cstring>
 
using namespace std;
vector<vector<int>> g(1000+10);
vector<int> l(10000 +10);
bool ch[1010];
int r = 0;
 
void dfs(int node, int i)
{
	if(ch[node])return;
	ch[node]=true;
	l[i] = node;
	//cout<<node<<endl;
	for(int y : g[node])
	{
		if(!ch[y])
		{
			dfs(y, i+1);
		}
	}
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) 
{
	r++;
	vector<int> labels(n);
	for(int i = 0; i < n-1; i++)
	{
		g[u[i]].push_back(v[i]);
    	g[v[i]].push_back(u[i]);
	}
	int spn = 0, c = 0;
	for(int i = 0; i < n; i++)
	{
		if(g[i].size() == 1)
		{
			c++;
			if((r == 1 && c ==1) || (r==2 && c==2))
			{
			spn = i;
			break;
			}
		}
	}
	dfs(spn, 0);
	//cout<<"hola"<<endl;
	for (int i = 0; i < n; i++) 
	{
		labels[l[i]] = i;
		//cout<<"l[i] "<<l[i]<<" lb i "<<labels[l[i]]<<endl;
	}
	//cout<<"---------"<<endl;
	memset(ch, false, sizeof(ch));
	for(int i=0; i<n; i++) g[i].clear(); 
	l.clear();
	return labels;
}
 
int find_next_station(int s, int t, vector<int> c) 
{
	if(t>s)return s+1;
	return s-1;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61