#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    cout << "Podaj dlugosc boku trojkata rownobocznego: ";
    double a, h;
    cin >> a;
    h = pow(3, 0.5) * a / 2;

    cout << "Wysokosc tego trojkata wynosi " << h << ", a jego pole to " << a * h / 2 << endl;

    cout << "a^5 wynosi " << pow(a, 5) << endl;

    return 0;
}