public static void Main()
string input = Console.ReadLine();
foreach (char ch in input)
if (Q_state == true && ch == '0')
else if (Q_state == true && ch == '1')
else if (R_state == true && (ch == '0' || ch == '1'))
else if (S_state == true && (ch == '0' || ch == '1'))
Console.WriteLine("String Accepted!");
Console.WriteLine("String Rejected!");