#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main() {
double sudut, kecepatan;
cin >> sudut >> kecepatan;
double g = 9.8; // percepatan gravitasi bumi
double rad = sudut * M_PI / 182.0; // ubah derajat ke radian
// rumus ketinggian maksimum
double ketinggian = pow(kecepatan * sin(rad), 2) / (2 * g);
cout << fixed << setprecision(2) << ketinggian << endl;
return 0;
}
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