Attempt2

using System;

namespace CookieFactory
{
    class Program
    {
        static void Main(string[] args)
        {

            int biscuits = int.Parse(Console.ReadLine());
            int workersCount = int.Parse(Console.ReadLine());
            int competingFactoryBiscuits = int.Parse(Console.ReadLine());
            double productionPerDay = 0;
            double totalProduction = 0;
            double biscuitsPerThreeDays = 0;
            for (int i = 1; i <= 30; i++)
            {

                if (i % 3 == 0)
                {
                    biscuitsPerThreeDays = biscuits * workersCount;
                    biscuitsPerThreeDays *= 0.75;
                    productionPerDay += biscuitsPerThreeDays;
                }
                else
                {
                    productionPerDay = biscuits * workersCount;
                }
                totalProduction += productionPerDay;
                productionPerDay = 0;

            }
            Console.WriteLine($"You have produced {totalProduction} biscuits for the past month.");
            double difference = 0;
            if(totalProduction < competingFactoryBiscuits)
            {
                difference = competingFactoryBiscuits - totalProduction;
                Console.WriteLine($"You produce {(difference/competingFactoryBiscuits*100):F2} percent less biscuits.");
            }
            else
            {
                difference = totalProduction - competingFactoryBiscuits;
                Console.WriteLine($"You produce {(difference/competingFactoryBiscuits*100):F2} percent more biscuits.");
            }

        }
    }
}