Submission #430708

#	Time	Username	Problem	Language	Result	Execution time	Memory
430708		JUANDI321	Stations (IOI20_stations)	C++17	0 / 100	885 ms	56336 KiB

stations

#include "stations.h"
#include <vector>
#include <iostream>

using namespace std;
vector<vector<int>> g(1e6+10);
vector<int> l(1e6 +10);
bool ch[1000010];

void dfs(int node, int i)
{
	if(ch[node])return;
	//cout<<"holis"<<endl;
	ch[node]=true;
	l[i] = node;
	//cout<<node<<endl;
	for(auto y : g[node])
	{
		if(!ch[y])
		{
			dfs(y, i+1);
		}
	}
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	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;
	for(int i = 0; i < n; i++)
	{
		if(g[i].size() == 1)
		{
			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]<<" i "<<i<<endl;
	}
	return labels;
}

int find_next_station(int s, int t, vector<int> c) 
{
	if(t>s)return c[1];
	return c[0];
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:12:12: warning: 'spn' may be used uninitialized in this function [-Wmaybe-uninitialized]
   12 |  if(ch[node])return;
      |     ~~~~~~~^
stations.cpp:33:6: note: 'spn' was declared here
   33 |  int spn;
      |      ^~~

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