Submission #1064761

#	Time	Username	Problem	Language	Result	Execution time	Memory
1064761		Osplei	Stations (IOI20_stations)	C++17	0 / 100	579 ms	688 KiB

stations

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

using namespace std;

#define pb push_back

vector <int> bfs (int n, int nodo, vector <int> grafo[1005]){
  vector <int> aux(n);
  bool visto[1005];
  queue <int> q;
  int pos = 0;

  for (int i = 0; i < 1005; i++) visto[i] = false;

  q.push(nodo);

  while (!q.empty()){
    int act = q.front();
    q.pop();

    if (visto[act] == true) continue;

    visto[act] = true;

    for (auto i : grafo[act]) q.push(i);

    aux[act] = pos;
    pos++;
  }

  return aux; 
}

vector <int> label(int n, int k, vector <int> u, vector <int> v) {
	
  vector <int> grafo[1005];

  map <int, int> entra;

  for (int i = 0; i < n; i++) entra[i] = 0;

  for (int i = 0; i < u.size(); i++) {
    int a = u[i], b = v[i];

    if (b < a) swap(a, b);

    entra[b]++;

    grafo[a].pb(b);
    grafo[b].pb(a);
  }

  for (auto i : entra) {
    if (i.second == 0){
      vector <int> labels = bfs(n, i.first, grafo);
    
      return labels;
    }
  }

  return u;
	
}

int find_next_station(int s, int t, vector <int> c) {

  if (c.size() == 1) return c[0];
	
  if (t > s) return max(c[0], c[1]);
  else return min(c[0], c[1]);
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:43:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   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