#include<bits/stdc++.h>
using namespace std;
int p=3.1415926,n,m,z;
int main(){
	cin>>n;
	m=n*n*p;
	z=n*2*p;
	cin>>m>>z;

	return 0;
}

/**************************************************************
	Problem: 1005
	User: liyunshuo
	Language: C++
	Result: Wrong Answer
****************************************************************/