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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int matrix[2][101], ord[101], n, count = 1;
  6.  
  7. void sort() {
  8.      int finished = 0, size = n, swapped;
  9.      while(!finished) {
  10.        swapped = 0;
  11.        for(int i = 1; i < size; ++i) {
  12.          if(matrix[1][ord[i]] > matrix[1][ord[i+1]]) {
  13.             int temp = ord[i];
  14.             ord[i] = ord[i+1];
  15.             ord[i+1] = temp;
  16.             swapped = 1;
  17.          }
  18.        }
  19.        if(swapped) size--;
  20.        else finished = 1;
  21.      }
  22. }
  23.  
  24. int main(int argc, char const *argv[]) {
  25.  
  26.   int start,
  27.       end;
  28.  
  29.   //freopen("spectacole.in", "r", stdin);
  30.  
  31.   //freopen("spectacole.out", "w", stdout);
  32.  
  33.   cin>>n;
  34.  
  35.   for(int i = 1; i <= n; ++i) {
  36.       ord[i] = i;
  37.       cin>>start>>end;
  38.       matrix[ 0 ][ i ] = start;
  39.       matrix[ 1 ][ i ] = end;
  40.   }
  41.  
  42.   sort();
  43.  
  44.   int curr = matrix[1][ord[1]];
  45.  
  46.   for(int i = 2; i <= n; ++i) {
  47.  
  48.       if(matrix[0][ord[i]] >= curr) {
  49.  
  50.         curr = matrix[ 1 ][ ord[ i ] ];
  51.  
  52.         count++;
  53.       }
  54.   }
  55.  
  56.   cout<<count;
  57.  
  58.   return 0;
  59. }
Success #stdin #stdout 0.01s 5516KB
comments (?)
stdin 
10
5 14
14 17
8 13
13 15
15 17
3 6
4 7
6 9
11 14
10 11
stdout 
5
https://ideone.com/yAJ3Cy
Spectacles Problem for PBInfo
language:
C++ (gcc 8.3)
created:
274 days ago
visibility:
secret

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