while 1111

//#1
            int girls = 0, boys = 0, mone = 0;
            while (girls != -1 && boys != -1)
            {
                boys = int.Parse(Console.ReadLine());
                girls = int.Parse(Console.ReadLine());
                if (boys == girls)
                    mone++;
            }
            Console.WriteLine(mone);

//#2
            Random rnd = new Random();
            int x, y, z;
        x = int.Parse(Console.ReadLine());
y = int.Parse(Console.ReadLine());
            while (x != 0 && y != 0)
            {
                if (x > y)
                    z = rnd.Next(y + 1, x);
                else
                    z = rnd.Next(x + 1, y);
                Console.WriteLine(z);
                x = int.Parse(Console.ReadLine());
                y = int.Parse(Console.ReadLine());
}

//#3
            int x, sum = 0, mone = 0;
            x = int.Parse(Console.ReadLine());
            while (x != 1000 && x > 999 && x < 10000)
            {
                if (x % 10 > x / 100 % 10)
                    sum += x;
                if (x / 10 % 10 % 2 == 0 && x / 1000 == 1)
                    mone++;
                x = int.Parse(Console.ReadLine());
            }
            Console.WriteLine("{0} {1}", sum, mone);

//#4
            int x;
            x = int.Parse(Console.ReadLine());
            while (x > 9 && x < 100)
            {
                if (x / 10 + 2 == x % 10)
                    Console.WriteLine(x);
                x = int.Parse(Console.ReadLine());
            }

//#5
            int x;
            x = int.Parse(Console.ReadLine());
            while (x != 0)
            {
                int i;
                string r = "rishoni";
                for (i = 2; i < x; i++)
                {
                    if (x % i == 0)
                        r = "lo";
                }
        if (x==1)
            r="lo";
                Console.WriteLine(r);
                x = int.Parse(Console.ReadLine());
}
//#6
            int x, digits = 1, sum=0;
            x = int.Parse(Console.ReadLine());
            while (x != -1) {
                while (x / 10 != 0)
                {
                    digits++;
                    sum += x % 10;
                    x /= 10;
                }
                sum += x % 10;
                Console.WriteLine("number of digits: {0}, sum of digits: {1}", digits, sum);
                x = int.Parse(Console.ReadLine());
                digits = 1;
                sum = 0;
            }