ProcedurProgramavimas_1.10

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
    const double PI = 3.14159265359;
    long double p, h, r, z;
    cin>>p;
    cin>>h;
    cin>>r;
    if(p==1)
    {
    z=(PI*(r*r))*h;
    cout<<fixed<<setprecision(2)<<z<<endl;
    }
    if(p==2)
    {
    z=((PI/3)*(r*r))*h;;
    cout<<fixed<<setprecision(2)<<z<<endl;
    }
    return 0;
}