7.3.2

    class Teams
    {
        public double points;
    }
    class Teams1 : Teams
    {
        public string name;
        public Teams1(string name, double points)
        {
            this.points = points;
            this.name = name;
        }
    }

    class Program
    {
        static void Up(Teams1[] x)
        {
            for (int i = 0; i < x.Length - 1; i++)
            {
                double xmax = x[i].points;
                int imax = i;
                for (int j = i + 1; j < x.Length; j++)
                {
                    if (x[j].points > xmax)
                    {
                        xmax = x[j].points;
                        imax = j;
                    }
                }
                Teams1 temp;
                temp = x[imax];
                x[imax] = x[i];
                x[i] = temp;
            }
        }
        static void Main(string[] args)
        {
            Teams1[] group1 = new Teams1[4];
            group1[0] = new Teams1("Atletico", 37);
            group1[1] = new Teams1("Real", 29);
            group1[2] = new Teams1("Barcelona", 41);
            group1[3] = new Teams1("CSKA", 34);
            Teams1[] group2 = new Teams1[4];
            group2[0] = new Teams1("Spartak", 35);
            group2[1] = new Teams1("Zenit", 29);
            group2[2] = new Teams1("Arsenal", 33);
            group2[3] = new Teams1("Akhmat", 27);
            Up(group1);
            Up(group2);
            Teams1[] mainGroup = new Teams1[(group1.Length + group2.Length) / 2];
            for (int i = 0; i < mainGroup.Length; i += 2)
            {
                mainGroup[i] = group1[i / 2];
                mainGroup[i + 1] = group2[i / 2];
            }
            for (int i = 0; i < 4; i++)
                WriteLine(mainGroup[i].name);
        }
    }