Submission #795880

#	Time	Username	Problem	Language	Result	Execution time	Memory
795880		BT21tata	Stations (IOI20_stations)	C++17	0 / 100	3044 ms	2097152 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

int cur;
vector<int> g[1005], labels;

void dfs(int v, int p, int x)
{
	if(!x) labels[v]=cur++;
	for(int u : g[v])
	{
		if(u==p) continue;
		dfs(u, v, x^1);
	}
	if(x) labels[v]=cur++;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v)
{
	labels.resize(n, 0);
	for(int i=0; i<u.size(); i++)
	{
		g[u[i]].push_back(v[i]);
		g[v[i]].push_back(u[i]);
	}
	dfs(0, -1, 0);
	return labels;
}

int find_next_station(int s, int t, vector<int> c)
{
	sort(c.begin(), c.end());
	if(s<c[0])
	{
		int fs=s;
		for(int i=0; i<c.size()-1; i++)
		{
			if(fs<=t and t<=c[i]) return c[i];
			fs=c[i]+1;
		}
		return c.back();
	}
	else
	{
		int last=s;
		for(int i=c.size(); i>0; i--)
		{
			if(c[i]<=t and t<=last) return c[i];
			last=c[i]-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:22:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  for(int i=0; i<u.size(); i++)
      |               ~^~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:37:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |   for(int i=0; i<c.size()-1; i++)
      |                ~^~~~~~~~~~~

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