#include <iostream>
#include <cmath>
#include <iomanip>
 
int main() {
    double sudut, kecepatan, dummy;
    // Membaca tiga input secara langsung
    std::cin >> sudut >> kecepatan >> dummy;
 
    // Menghitung ketinggian dalam satu baris
    // (2 * Gravitasi) menjadi 20.0
    // PI / 180.0 digunakan untuk konversi ke radian
    double ketinggian = (pow(kecepatan, 2) * pow(sin(sudut * 3.14159265 / 180.0), 2)) / 20.0;
 
    // Mencetak hasil yang sudah diformat
    std::cout << std::fixed << std::setprecision(2) << ketinggian << std::endl;
 
    return 0;
}
 

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

MzcKMTAwCjEwMA==

37
100
100