Ex 3

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;

namespace SandBox
{
    public class Product
    {
        public int id { get; set; }
        public string name { get; set; }
        public int price { get; set; }
        public string date { get; set; }
    }
    public class Program
    {
        static void Main(string[] args)
        {
            string inputJSON = Console.ReadLine();

            List<string> filtersList = new List<string>(5);
            for (int i = 0; i < 5; i++)
            {
                filtersList.Add(Console.ReadLine());
            }

            Dictionary<string, string> filtersDict = new Dictionary<string, string>(5);

            foreach (var filter in filtersList)
            {
                filtersDict.Add(filter.Split(' ')[0], filter.Split(' ')[1]);
            }

            List <Product> products= new List<Product>();
            products = JsonSerializer.Deserialize<List<Product>>(inputJSON);

            DateTime dateAfter = new DateTime(Convert.ToInt32(filtersDict["DATE_AFTER"].Split('.')[2]),
                Convert.ToInt32(filtersDict["DATE_AFTER"].Split('.')[1]),
                Convert.ToInt32(filtersDict["DATE_AFTER"].Split('.')[0]));
            DateTime dateBefore = new DateTime(Convert.ToInt32(filtersDict["DATE_BEFORE"].Split('.')[2]),
                Convert.ToInt32(filtersDict["DATE_BEFORE"].Split('.')[1]),
                Convert.ToInt32(filtersDict["DATE_BEFORE"].Split('.')[0]));

            List<Product> selectedProducts = new List<Product>();

            foreach (var product in products)
            {
                DateTime date = new DateTime(Convert.ToInt32(product.date.Split('.')[2]),
                    Convert.ToInt32(product.date.Split('.')[1]),
                    Convert.ToInt32(product.date.Split('.')[0]));
                if (product.name.ToLower().Contains(filtersDict["NAME_CONTAINS"].ToLower()) &&
                    product.price >= Convert.ToInt32(filtersDict["PRICE_GREATER_THAN"]) &&
                    product.price <= Convert.ToInt32(filtersDict["PRICE_LESS_THAN"]) &&
                    date >= dateAfter && date <= dateBefore)
                {
                    selectedProducts.Add(product);
                }
            }

            var sortedSelectedProducts = from p in selectedProducts orderby p.id select p;
            Console.WriteLine(JsonSerializer.Serialize(sortedSelectedProducts));
        }
    }
}