#include<iostream>
using namespace std;
int main()
{
	cout<<4*(1.0-1.0/3+1.0/5-1.0/7+1.0/9-1.0/11)<<endl;
	cout<<4*(1.0-1.0/3+1.0/5-1.0/7+1.0/9-1.0/11+1.0/13)<<endl;
	
	return 0;
}