Submission #546779

#	Time	Username	Problem	Language	Result	Execution time	Memory
546779		brunnorezendes	Stations (IOI20_stations)	C++17	0 / 100	6 ms	860 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
#define maxn 1006

using namespace std;

typedef vector <int> vi;
typedef vector <vi> vvi;
typedef pair <vi,  int> vii;

int cont;
int resp[maxn];

void dfs(int x, vvi g, int pai){
	int i;
	for(i=0;i<g[x].size();i++){
		if(g[x][i]!=pai){
			dfs(g[x][i], g, x);
		}
	}
	resp[x] = cont++;
}

vi label(int n, int k, vi u, vi v){
	vvi g = vvi(n);
	vi labels = vi(n);
	for(int i=0;i<u.size();i++){
		g[u[i]].push_back(v[i]);
	}
	cont=0;
	dfs(0, g, 0);
	for(int i=0;i<n;i++) labels[i] = resp[i];
	return labels;
}

int find_next_station(int s, int t, vi c){
	int l=0, r=c.size()-1, mid;
	while(r>l){
		mid = (l+r)/2;
		if(t<=c[mid]){
			r = mid;
		}
		else l = mid+1;
	}
	return c[l];
}

Compilation message (stderr)

stations.cpp: In function 'void dfs(int, vvi, int)':
stations.cpp:16:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |  for(i=0;i<g[x].size();i++){
      |          ~^~~~~~~~~~~~
stations.cpp: In function 'vi label(int, int, vi, vi)':
stations.cpp:27:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  for(int i=0;i<u.size();i++){
      |              ~^~~~~~~~~

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