Day_29.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
class Solution
{

    static void Main(String[] args)
    {
        int t = Convert.ToInt32(Console.ReadLine());
        for (int a0 = 0; a0 < t; a0++)
        {
            string[] tokens_n = Console.ReadLine().Split(' ');
            int n = Convert.ToInt32(tokens_n[0]);
            int k = Convert.ToInt32(tokens_n[1]);

            int maxAnd = -1;
            for (int i = 1; i < n; i++)
            {
                for (int j = i + 1; j <= n; j++)
                {
                    //Console.WriteLine(i & j);   
                    if (((i & j) > maxAnd) && ((i & j) < k))
                    {
                        maxAnd = i & j;
                    }
                       
                }
            }
            Console.WriteLine(maxAnd);
            Console.ReadKey();
        }
    }
}