exam preparation

using System;

namespace exampreparation
{
    class exam
    {
        static void Main(string[] args)
        {
            double students = double.Parse(Console.ReadLine());
            int seasons = int.Parse(Console.ReadLine());
            double continuing = 0.0;

            for (int i = 1; i <= seasons; i++)
            {
                double firstExam = Math.Ceiling(students * 0.90);
                double secondExam = Math.Ceiling(firstExam * 0.90);
                 continuing = Math.Ceiling(secondExam * 0.80);

                if (i % 3 == 0)
                {
                    continuing += Math.Ceiling(continuing * 0.15);
                }
                else
                {
                    continuing += Math.Ceiling(continuing * 0.05);
                }

                students = continuing;
            }

            Console.WriteLine($"Students: {students}");
        }
    }
}