#include<iostream>
#include<cstdlib>
using namespace std;
class valjak
{
	double r,H;
	public:
	void inic(double a, double b)
	{
		r=a;
		H=b;
	}
	void citaj()
	{
		cout<<"r=";
		cin>>r;
		cout<<"H=";
		cin>>H;
	}
	void pisi()
	{
		cout<<"r="<<r<<endl;
		cout<<"H="<<H<<endl;
	}
	double povrsina();
	double zapremina();
	double poredi();
};
double valjak::povrsina()
{
	double p;
	p=2*r*r*3.14+2*r*3.14*H;
	return p;
}
double valjak::zapremina()
{
	double v;
	v=r*r*3.14*H;
	return v;
}
double valjak::poredi(double e)
{
	if(s.zapremina>e) return s.zapremina;
	else return e;
}
int main()
{
	valjak s,p;
	double k,j,por;
	s.citaj();
	s.pisi();
	k=s.povrsina();
	cout<<"P="<<k<<endl;
	k=s.zapremina();
	cout<<"V="<<k<<endl;
	p.citaj();
	por=s.poredi(p.zapremina);
	cout<<por;
	system("PAUSE");
	return 0;
}