задача 15

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

namespace LesonLoop_2
{
    class Loop_2
    {
        static void Main(string[] args)
        {
            Console.Write("n = ");
            int n = int.Parse(Console.ReadLine());
            int p3 = 3;
            int p4 = 4;
            int p5 = 5;
            int p24 = 24;
            int p25 = 25;
            int p26 = 26;

            int maskP3 = 1 << p3;
            int maskP4 = 1 << p4;
            int maskP5 = 1 << p5;
            int maskP24 = 1 << p24;
            int maskP25 = 1 << p25;
            int maskP26 = 1 << p26;

            int newN3 = n&(~maskP3);
            int newN4 = n&(~maskP4);
            int newN5 = n&(~maskP5);
            int newN24 = n&(~maskP24);
            int newN25 = n&(~maskP25);
            int newN26 = n&(~maskP26);

            int bit3 = newN3 ^ n;
            int bit4 = newN4 ^ n;
            int bit5 = newN5 ^ n;
            int bit24 = newN24 ^ n;
            int bit25 = newN25 ^ n;
            int bit26 = newN26 ^ n;

            if ((bit3 >> p3) == (bit24 >> p24))
            {
                if ((bit4 >> p4) == (bit25 >> p25))
                {
                    if ((bit5 >> p5) == (bit26 >> p26))
                    {
                        Console.WriteLine("n= " + n);
                    }
                    else
                    {
                        int endBit5 = n ^ maskP5;
                        int endBit526 = endBit5 ^ maskP26;
                        Console.WriteLine("endBit526 = " + endBit526);
                    }
                }
                else
                {
                    int endBit4 = n ^ maskP4;
                    int endBit425 = endBit4 ^ maskP25;
                    int endBit425526 = (endBit425 ^ maskP5) ^ maskP26;
                    Console.WriteLine(((bit5 >> p5) == (bit26 >> p26)) ? ("endBit425 = " + endBit425) : ("endBit425526 = " + endBit425526));
                }
            }
            else
            {
                if ((bit4 >> p4) == (bit25 >> p25))
                {
                    if ((bit5 >> p5) == (bit26 >> p26))
                    {
                        int endBit3 = n ^ maskP3;
                        int endBit324 = endBit3 ^ maskP24;
                        Console.WriteLine("endBit324 = " + endBit324);
                    }
                    else
                    {

                        int endBit3 = n ^ maskP3;
                        int endBit324 = endBit3 ^ maskP24;
                        int endBit3245 = endBit324 ^ maskP5;
                        int endBit324526 = endBit3245 ^ maskP26;
                        Console.WriteLine("endBit324526 = " + endBit324526);
                    }
                }
                else
                {
                    int endBit3 = n ^ maskP3;
                    int endBit324 = endBit3 ^ maskP24;
                    int endBit3244 = endBit324 ^ maskP4;
                    int endBit324425 = endBit3244 ^ maskP25;
                    int endBit324425526 = ((endBit324425^maskP5)^maskP26);
                    Console.WriteLine(
                        ((bit5>>p5)==(bit26>>p26)) ? ("endBit324425 = " + endBit324425) : ("endBit324425526 = " + endBit324425526));
                }
            }
        }
    }
}