#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main() {
double v, theta;
cin >> v >> theta; // input kecepatan dan sudut
double g = 9.8;
double rad = theta * M_PI / 180.0; // konversi ke radian
double R = (v * v * sin(2 * rad)) / g;
cout << fixed << setprecision(1) << R << endl;
return 0;
}
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