BitExchangeAdvanced

class BitExchangeAdvanced
    {
        static void Main()
        {
            Console.Write("N = ");
            long numberN = long.Parse(Console.ReadLine());
            Console.Write("P = ");
            int bitP = int.Parse(Console.ReadLine());
            Console.Write("Q = ");
            int bitQ = int.Parse(Console.ReadLine());
            Console.Write("K = ");
            int lengthK = int.Parse(Console.ReadLine());
            int distance = Math.Abs(bitP - bitQ);

            if ((numberN > 4294967295) | (bitP + lengthK > 32) | (bitQ + lengthK > 32) |
                    (bitP > 31 | bitQ > 31) | (bitP < 0 | bitQ < 0))
            {
                Console.WriteLine("out of range");
                Main();
            }
            uint number = (uint) numberN;
            if (distance >= lengthK)
            {
                uint unit = (1u << lengthK) - 1;  //2^k-1
                uint mask1 = ((unit << bitP) | (unit << bitQ)) & number;
                uint mask2 = (mask1 << distance) | (mask1 >> distance);
                uint result = (number & (~mask1)) | mask2;
                Console.WriteLine(result);
            }
            else
            {
                Console.WriteLine("overlapping");
            }
        }
    }