Console.WriteLine("//lab1 | Select task, what u need:\n\t===========\n\t * 1.1 - a\n\t * 1.2 - b\n\t-----------\n\t EXIT - e\n\t===========\n");
string menu = Console.ReadLine();
Console.WriteLine("\t-----------");
Console.WriteLine("\t--- 1.1 ---\n\t-----------");
Console.Write("Enter X: ");
long x = Convert.ToInt64(Console.ReadLine());
Console.Write("Enter Z: ");
long z = Convert.ToInt64(Console.ReadLine());
Console.WriteLine("\t\t {0}\nNumber - {1}\n_____________________", x, z);
for (int i = 2; i < x; i++) {
Console.WriteLine("Result: {0}", n);
Console.WriteLine("\n\n\t-----------\n\t-----------\n");
Console.WriteLine("\t-- exit() -\n\t-----------");