static void Step3770()
 {
     Console.WriteLine();
     Console.WriteLine("3770");
     Console.WriteLine("{0} ({1})", Lab05.Task3770(1, 2, 3), 3);
     Console.WriteLine("{0} ({1})", Lab05.Task3770(7, 4, -2), 7);
     Console.WriteLine("{0} ({1})", Lab05.Task3770(0, 5, -7), 5);
 }