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  1. #include <iostream>
  2.  
  3. #include <cmath>
  4. #include <cstdlib>
  5.  
  6. int getWrongMoves(int n, int k)
  7. {
  8.     int result = 1;
  9.     for (int i = 1; i < n - k; ++i)
  10.     {
  11.         result = 2 * result + i;
  12.     }
  13.     return  result;
  14. }
  15.  
  16. int main(int argc, char *argv[])
  17. {
  18.     int n = 5;
  19.     int k = 2;
  20.  
  21.     if (argc > 2)
  22.     {
  23.         n = atoi(argv[1]);
  24.         k = atoi(argv[2])+1;
  25.     }
  26.     if (n < 1 || n > 100)
  27.     {
  28.         std::cout << "Usage: zenik <N>, <K>\n"
  29.                   " where 1 <= N, K <= 100" << std::endl;
  30.         return 0;
  31.     }
  32.  
  33.     double allMoves = std::pow(2, n-1);
  34.     double wrongMoves = 0;
  35.  
  36.     if (k == 1)
  37.     {
  38.         wrongMoves = allMoves - 1;
  39.     }
  40.     else if (k >= n)
  41.     {
  42.         wrongMoves = 0;
  43.     }
  44.     else
  45.     {
  46.         wrongMoves = getWrongMoves(n, k);
  47.     }
  48.  
  49.     std::cout << "all moves: " << allMoves <<  std::endl;
  50.     std::cout << "wrong moves: " << wrongMoves <<  std::endl;
  51.     std::cout << "corect moves: " << allMoves - wrongMoves <<  std::endl;
  52.  
  53.     return 0;
  54. }
Success #stdin #stdout 0s 4340KB
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stdin
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Standard input is empty
stdout
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all moves: 16
wrong moves: 8
corect moves: 8
https://ideone.com/w2rkTA
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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