01.01 Melons and Watermelons

using System;
class Program
{
    static void Main()
    {
        int s = int.Parse(Console.ReadLine());
        int d = int.Parse(Console.ReadLine());

        int melons = 0; int watermelons = 0;

        for (int i = s; i < d + s; i++)
        {
            switch (i % 7)
            {
                case 1: watermelons += 1; break;
                case 2: melons += 2; break;
                case 3: watermelons += 1; melons += 1; break;
                case 4: watermelons += 2; break;
                case 5: melons += 2; watermelons += 2; break;
                case 6: watermelons += 1; melons += 2; break;
                default: break;
            }
        }
        int diff = Math.Abs(melons - watermelons);

        if (melons > watermelons)
        {
            Console.WriteLine("{0} more melons", diff);
        }
        else if (watermelons > melons)
        {
            Console.WriteLine("{0} more watermelons ", diff);
        }
        else
        {
            Console.WriteLine("Equal amount: {0}", melons);
        }
    }
}