#include <iostream>
#include <iomanip>
 
int main() {
    // Data awal
    double v0 = 59.5;    // kecepatan awal dalam m/s (contoh nilai)
    double g = 9.8;      // percepatan gravitasi m/s^2
 
    // Hitung ketinggian maksimum
    double h = (v0 * v0) / (2 * g);
 
    // Tampilkan hasil dengan 2 angka di belakang koma
    std::cout << std::fixed << std::setprecision(2);
    std::cout << h << std::endl;
 
    return 0;
}
 
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