using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp4
{
    class Program
    {
        static string ABCD(byte a, byte b, byte c, byte d)
        {
            int abcd = 0;
            abcd = abcd | a;
            abcd = abcd << 8;
            abcd = abcd | b;
            abcd = abcd << 8;
            abcd = abcd | c;
            abcd = abcd << 8;
            abcd = abcd | d;
            string output = Convert.ToString(abcd, 2);
            return output;
        }

        static string[] abcd(int abcd)
        {
            int[] ADCD = new int[4];
            ADCD[3] = abcd & 0b11111111;
            abcd = abcd >> 8;
            ADCD[2] = abcd & 0b11111111;
            abcd = abcd >> 8;
            ADCD[1] = abcd & 0b11111111;
            abcd = abcd >> 8;
            ADCD[0] = abcd & 0b11111111;
            string[] ABCDstring = new string[4];
            ABCDstring[0] = Convert.ToString(ADCD[0], 2);
            ABCDstring[1] = Convert.ToString(ADCD[1], 2);
            ABCDstring[2] = Convert.ToString(ADCD[2], 2);
            ABCDstring[3] = Convert.ToString(ADCD[3], 2);
            return ABCDstring;
        }

        static string Round (int c)
        {
            string с_string = c.ToString();
            string c_round = "";
            for (int i = с_string.Length - 1; i >= 0; i--)
            {
                c_round = c_round + с_string[i];
            }
            return c_round;
        }

        static void Main(string[] args)
        {
            //Первое задание
            Console.WriteLine(ABCD(3, 4, 5, 6));
            string[] write = abcd(0b11000001000000010100000110);
            for (int i = 0; i < write.Length; i++)
            {
                Console.WriteLine(write[i]);
            }

            // Второе задание
            int a = 0b101;
            a = ~a;
            string b = Convert.ToString(a, 2);
            Console.WriteLine(b);

            //Третье задание
            Console.WriteLine(Round(15));

        }
    }
}