Submission #1073789

#	Time	Username	Problem	Language	Result	Execution time	Memory
1073789		Osplei	Stations (IOI20_stations)	C++17	0 / 100	662 ms	25304 KiB

stations

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

    int pos = 0;
     
    vector <int> bfs (int n, int nodo, vector <int> grafo[1000005]){
      vector <int> aux(n);
      bool visto[1000005];
      queue <int> q;
     
      for (int i = 0; i < 1000005; 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[1000005];
     
      for (int i = 0; i < u.size(); i++) {
        int a = u[i], b = v[i];
     
        grafo[a].pb(b);
        grafo[b].pb(a);
      }
     
      for (int i = 0; i < n; i++){
        if (grafo[i].size() == 1){
          vector <int> labels = bfs(n, i, grafo);
          //for (auto j : labels) cout << j << " ";
          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]);
    }
     
    /*
     
    int main(){
      label(5, 10, {0, 3, 4, 2}, {1, 4, 0, 1});
    }
     
    */

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:40:25: 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 < u.size(); i++) {
      |                       ~~^~~~~~~~~~

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