#include <iostream>
#include <cmath>
using std::cout;
using std::endl;
using std::cin;
int main()
{
int z;
int x;
int y;
cout << "z = x*ln(x) + (y/cos(x) - (x/3))" << endl;
cout << "Enter x,y:\n " << endl;
cin >> x;
cin >> y;
if ((cos (x) - (x / 3) == 0) || (x == 0))
{
cout << " Нет решений " << endl;
}
else
{
z = x * log(x) + (y / cos(x) - (x / 3));
}
cout << z << endl;
return 0;
}