namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] a = new int[3];
            int motek, mkat=0, max, imax;
            for (int i = 1; i < 3; i++)
                a[i] = 0;

            Console.WriteLine("please enter numbers of katalogs");
                for (int j = 1; j < 5; j++)
                {
                    mkat = int.Parse(Console.ReadLine());
                    Console.WriteLine("please enter number of otakim that sold");
                    motek = int.Parse(Console.ReadLine());
                    a[mkat] = a[mkat] + motek;
                }

            max = a[1];
            imax = 1;
            for (int i = 1; i < 3; i++)
            if(a[i]>max)
            {
                max = a[i];
                imax = i;
            }

            Console.WriteLine(imax + "number katalugi of the best seller");
        }
    }
}