#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
 
int main() {
    double sudut, kecepatan, waktu;
    const double g = 9.8; // percepatan gravitasi (m/s^2)
 
    cin >> sudut >> kecepatan;
 
    // Rumus waktu total proyektil: t = (2 * v * sin(θ)) / g
    double rad = sudut * M_PI / 180.0;
    waktu = (2 * kecepatan * sin(rad)) / g;
 
    cout << fixed << setprecision(3);
    cout << waktu << endl;
 
    return 0;
}
 

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

MzcKMTAw

37
100