#include <iostream>

#include <cmath>

int main()

{

double x, y, s, boof1, boof2;

int function;

std::cin >> x >> y; std::cout << std::endl;

std::cout << "select your function 1 - sh(x), 2 - x^2, 3 - e^x" << std::endl;

std::cin >> function;

switch(function){

case 1:boof1 = sinh(x); break;

case 2:boof1 = pow(x, 2); break;

case 3:boof1 = exp(x); break;

default: std::cout <<"error"<< std::endl;

return 0;

}

boof2=x*y;

if(0.5 < x*y && x*y < 10)

s = exp(boof2-fabs(y));

else if(0.1 < boof2 && boof2 < 0.5)

s = pow(boof2 + y, 1.0/0.3);

else

s=2*pow(boof2, 2);

std::cout << s;

}