#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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