lab4(102)

#include <iostream>
#include <cmath>
using namespace std;

int main() {
    double r, a, x, y, z, c, d, e, S1, S2, S3, S4, F, p;
    cin>>r>>a>>x>>z>>c>>d>>e;
    S1 = 2*3.14*r;
    S2 = a*a;
    S3 = x*y;
    p = (c+d+e)/2;
    S4 = sqrt(p*(p-c)*(p-d)*(p-e));
    F = max(max(S1, S2), max(S3, S4));
    cout<<"Наибольшая фигура с площадью ";
    cout<<F;
}