#include <cmath>
#include <iostream>
using namespace std;
int main() {
float z(0), x(126), y(456);
z = 1 - sin(x + y) * cos(x - y);
if(z<0) {
z = z*-1;
cout << 1;
}
z = z - sqrt(x*x*x);
cout << z;
