#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    int cif,x;
    float f;
    cin>>x;
    cin>>cif;
    switch(cif)
    { case 1:f=x^2-6*x;break;
                  case 2:f=sqrt(x*x*x*x+12);break;
                  case 3:f=2*x+12;break;
                  default:f=14; }
                   cout<<f;
    return 0;
}