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

    class projectile
    {
        private:
        double velocity;
        double angle;
        public:
        projectile(double v,double a){
            velocity=v;
            angle=a;
        }
        void calculateMaxHeight(){
            if(velocity<0||angle<0){
                cout<<"Invalid input"<<endl;
                return;
            }
            const double g=9.81;
            double angleRed=angle*M_PI/180.0;
            double MaxHeight=(pow(velocity,2)*pow(sin(angleRed),2))/(2*g);
            cout<<setprecision(2)<<MaxHeight<<endl;
        }
    };
int main()
{
    double v,a;
    cina>>v>>a;
    projectile p(v,a);
    p.calculateMaxHeight();
    return 0;
}