#include <iostream>
#include <cmath> // untuk sin dan konversi ke radian
 
#define G 10 // gravitasi
 
int main() {
    int s;         // sudut peluncuran (derajat)
    double v;      // kecepatan awal (m/s)
 
    std::cin >> s;
    std::cin >> v;
 
    // Konversi sudut dari derajat ke radian
    double sudut_radian = s * M_PI / 180.0;
 
    // Hitung jarak horizontal menggunakan rumus gerak parabola
    double jarak = (v * v * sin(2 * sudut_radian)) / G;
 
    // Output hanya angka jarak
    std::cout << jarak << std::endl;
 
    return 0;
}
 
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