#include <iostream>
#include <cmath>

int main()
{
	float 
		a, b, x,
		m, n;
	std::cin >> a >> b >> x;
	std::cout << "а) " << (a + 2*b)/ exp(x) << std::endl;
	
	
	std::cin >> m >> n >> x;
	std::cout << "в) " << sqrt(m + pow(n,2)) / exp(x) << std::endl;
	
}