#include

/* main program function */
int main()
{
  int
    iMulEven = 1,
    iMulOdd = 1,
    iNumber;
  char cMask = 0;

  std::cin >> iNumber;
  if (iNumber > 9999 || iNumber < 1000)
  {
    std::cout << "Error! Input the correct number!" << std::endl;
    return 0;
  }
  
  for (int i = 0; i < 4; i++)
  = 2;
    iNumber /= 10;
 

  if (cMask == 3)
    std::cout << static_cast(iMulEven) / iMulOdd << std::endl;
  else if (cMask == 1)
    std::cout << "There is no odd digits exists." << iMulEven << std::endl;
  else
    std::cout << "There is no even digits exists." << iMulOdd << std::endl;
  return 0;
} /* end of the 'main' function */