#include <cctype>
#include <iostream>
#include <cmath>
int phi (int x, int i) {
   if ( i > 15 ) {
       return 0;
   } else {
        std::cout << x; std::cout << std::endl;
        x = x - phi(x, i + 1) * pow(2,i + 1);
        return floor( x / pow(2, i));
   }

}
int main()
{
  std::cout << phi(129,4);
}