#include <iostream>
#include <iomanip>

// prototypes
void showMenu();
void critRed();

int main()
{
	// constants
	int ch;

	std::cout << "\tCritical applicaton :: lulz(trollface)" << std::endl;
	do
	{
		showMenu();
		std::cin >> ch;
		switch (ch)
		{
		case 1 : critRed();
			break;
		case 2 : //
			break;
		case 3 : //
			break;
		default:
			break;
		}
	} while (ch != 3);

	return 0;
}

void showMenu()
{
	std::cout << "\n1) Critical Reduction\n";
	std::cout << "2) Critical change raw\n";
	std::cout << "Enter choice: ";
}

void critRed()
{
	double n, result;
	std::cout << "Enter value: ";
	std::cin >> n;
	result = (50 * (n-300) / 4) / ((n-300) / 4 + 125);
	std::cout << std::fixed << std::setprecision(2);
	std::cout << "Result: " << result << "%" << std::endl;
}