31.01.2020. CSharp

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _31._01._2020.CS
{
    class Program
    {
        interface IAdBlocker
        {
            List<Ad> CreateAdList(List<Ad> ads);
            int GetViewCount(List<Ad> ads);
        }

        class Ad
        {
            public int ViewCount { get; set; }
            public double Price { get; set; }
            public List<string> KeyWords { get; set; }
        }

        class TurboBlock : IAdBlocker
        {
            List<string> KeyWords;
            public TurboBlock(List<string> keyWords) { this.KeyWords = keyWords; }

            public List<Ad> CreateAdList(List<Ad> ads)
            {
                List<Ad> newAdsList = new List<Ad>();
                for (int i = 0; i < ads.Count; i++)
                {
                    for (int j = 0; j < KeyWords.Count; j++)
                    {
                        if(ads[i].KeyWords.Contains(KeyWords[j]))
                        {
                            newAdsList.Add(ads[i]);
                            break;
                        }
                    }
                }
                return newAdsList;
            }

            public int GetViewCount(List<Ad> ads)
            {
                double sum = 0;
                for(int i = 0; i < ads.Count; i++)
                {
                    sum += ads[i].Price;
                }
                double average = sum / ads.Count;
                int counter = 0;
                for ( int i = 0; i < ads.Count; i++)
                {
                    if(ads[i].Price < average)
                    {
                        counter += ads[i].ViewCount;
                    }
                }
                return counter;
            }
        }

        double CalculateAveragePrice(List<Ad> ads)
        {
            double sum = 0;
            for (int i = 0; i < ads.Count; i++)
            {
                sum += ads[i].Price / ads[i].ViewCount;
            }
            return sum / ads.Count;
        }

        static void Main(string[] args)
        {
            if(CalculateAveragePrice(ads) > CalculateAveragePrice(promo))
            {
                Console.WriteLine("Ads je isplativiji.");
            }
            else
            {
                Console.WriteLine("Promo je isplativiji.");
            }
        }
    }
}