#include <iostream>
#include <string>
#include <math.h>
#include <iomanip>

using namespace std;

class CIRCLE{
	float radius;
	string color;
public:
	void SetRadius(float dim);
	void SetColor(string clr);
	float GetRadius();
	string GetColor();
	CIRCLE();
	CIRCLE(float dim, string clr);
	CIRCLE (const CIRCLE &s);
	~CIRCLE();
	friend float Perimeter(CIRCLE *SP);
	float Area();
};

void CIRCLE::SetRadius(float dim){
	radius=dim;
}

void CIRCLE::SetColor(string clr){
	color=clr;
}

float CIRCLE::GetRadius(){
	return radius;
}

string CIRCLE::GetColor(){
	return color;
}

CIRCLE::CIRCLE(){
	radius=10;
	color="green";

}

CIRCLE::CIRCLE(float dim, string clr){
	radius=dim;
	color=clr;

}

CIRCLE::CIRCLE(const CIRCLE &s){
	radius=s.radius;
	color=s.color;

}

CIRCLE::~CIRCLE(){

}

float Perimeter(CIRCLE *s){
	float perimeter;
	perimeter=2*M_PI*s->radius;
	return perimeter;
}

float CIRCLE::Area(){
	float area;
	area=M_PI*pow(radius,2);
	return area;
}

void Generic1(CIRCLE s){

}

CIRCLE Generic2(CIRCLE &s){

	return s;
}

class CONE:public CIRCLE{
	float height;
public:
	void SetHeight(float dim){
		height=dim;
	}

	float GetHeight(){
		return height;
	}

	float Volume(){
		float volume;
		volume=(Area()*height)/3;
		return volume;
	}
	CONE(float dim){
		height=dim;
	}
};

int main(int argc, char** argv){
	float r;
	string c;
	cin>>r;
	cin>>c;
 CIRCLE c1(r, c);
 	cin>>r;
 CONE c2(r);
 	cout<<setprecision(2)<<fixed<<Perimeter(&c1)<<endl;
 	cout<<setprecision(2)<<fixed<<c1.Area()<<endl;
 	cout<<setprecision(2)<<fixed<<c2.Volume();

}