Submission #321605

#	Time	Username	Problem	Language	Result	Execution time	Memory
321605		keta_tsimakuridze	Stations (IOI20_stations)	C++14	100 / 100	960 ms	1408 KiB

stations

#include <cstdio>
#include "stations.h"
#include <vector>
#include<bits/stdc++.h>
using namespace std;
const int N=1005;
int fix[N],timer;
 vector<int> V[N],labels;
void dfs(int u,int h){
	fix[u]=1;
	if(h%2==0) timer++,labels[u]=timer;
	for(int i=0;i<V[u].size();i++){
		if(!fix[V[u][i]]){
			dfs(V[u][i],h+1);
		}
	}
	if(h%2) timer++,labels[u]=timer;
}
 
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	labels.clear();
	labels.resize(n);
	for(int i=0;i<n;i++)
	V[i].clear(),fix[i]=0;
	for (int i = 0; i < u.size(); i++) {
		V[u[i]].push_back(v[i]);
		V[v[i]].push_back(u[i]);
	} timer=0;
	for(int i=0;i<n;i++){
		if(!fix[i]){
			dfs(i,0);
		}
	}
	return labels;
}
 
int find_next_station(int s, int t, std::vector<int> c) {
	if(s<c[0]) {
	    if(t>s){	
			for(int i=0;i<c.size()-1;i++){
				if(t<=c[i]) return c[i];
			}
		}
		return c[c.size()-1];			
	}
	else {
		if(t<s){
			for(int i=c.size()-1;i>=1;i--)
			if(t>=c[i]) return c[i];
		}
		return c[0];
	}
}//

Compilation message (stderr)

stations.cpp: In function 'void dfs(int, int)':
stations.cpp:12:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |  for(int i=0;i<V[u].size();i++){
      |              ~^~~~~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for (int i = 0; i < u.size(); i++) {
      |                  ~~^~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:40:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |    for(int i=0;i<c.size()-1;i++){
      |                ~^~~~~~~~~~~

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