#include <iostream>
#include <math.h>
using namespace std;
int main(int argc, const char * argv[]) {
    double a, p, result;
    cout << "Input area of square: " << endl;
    cin >> a;
    result = 4 * sqrt(a);
    cout << "P = " << result << endl;

    cout << "Input P of triangle: ";
    cin >> p;

    double triangle_a = p/3;
    double s_triangle = pow(triangle_a, 2) * sqrt(3)/4;

    cout << "S of triangle = " << s_triangle << endl;
    return 0;
}