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  1. #include <iostream>
  2. using namespace std;
  3.  
  4.  
  5. int partition(int* liczba,char* znaki, int p, int r)
  6. {
  7.     int pivot = liczba[r];
  8.  
  9.     while ( p < r )
  10.     {
  11.         while ( liczba[p] > pivot )
  12.             p++;
  13.  
  14.         while ( liczba[r] < pivot )
  15.             r--;
  16.  
  17.         if ( liczba[p] == liczba[r] )
  18.             p++;
  19.         else if ( p < r ) {
  20.             int tmp = liczba[p];
  21.             char tmpch= znaki [p];
  22.             liczba[p] = liczba[r];
  23.             znaki[p] = znaki[r];
  24.             liczba[r] = tmp;
  25.             znaki[r] = tmpch;
  26.         }
  27.     }
  28.  
  29.     return r;
  30. }
  31.  
  32. int quick_select(int*liczba, char* znaki, int p, int r, int k)
  33. {
  34.     if ( p == r ) return znaki[p];
  35.     int j = partition(liczba,znaki, p, r);
  36.     int length = j - p + 1;
  37.     if ( length == k ) return znaki[j];
  38.     else if ( k < length ) return quick_select(liczba,znaki, p, j - 1, k);
  39.     else  return quick_select(liczba,znaki, j + 1, r, k - length);
  40. }
  41.  
  42. int main()
  43. {
  44.  
  45.     int n,k;
  46.     char z;
  47.     cin>>n;
  48.     int *liczby=new int [n];
  49.     char *znaki=new char [n];
  50.     for(int i=0;i<n;++i)
  51.     {
  52.         cin>>liczby[i];
  53.         cin>>znaki[i];
  54.     }
  55.     cin>>k;
  56.     for ( int i =1; i <=k; i++)
  57.     {
  58.         if (i!=1)
  59.         {
  60.             cout<<endl;
  61.         }
  62.         z=quick_select(liczby, znaki, 0, n-1, i);
  63.         cout<<z;
  64.     }
  65.     delete [] liczby;
  66.     delete [] znaki;
  67.   return 0;
  68. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/l96UWn
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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