import java.math.BigDecimal;
import java.util.Scanner;


public class fllowers {
    public static void main(String[] args) {



        Scanner scanner = new Scanner(System.in);


        double countHrizantemi = Double.parseDouble(scanner.nextLine());
        double countRozi = Double.parseDouble(scanner.nextLine());
        double countLaleta = Double.parseDouble(scanner.nextLine());
        String season = scanner.nextLine();
        String holiday = scanner.nextLine();
        double otstapkaZaBroi = 1.0;
        double hrizantemi = 1.0;
        double rozi = 1.0;
        double laleta = 1.0;
        double otstapkaZaBroiNadDvaise = 1.0;

        if(season.equals("Summer")  || season.equals("Spring")){
             hrizantemi = 2.00;
             rozi = 4.10;
             laleta = 2.50;
            if(countLaleta > 7){
            otstapkaZaBroi = 0.05;
            }

        }
        if(season.equals("Winter") || season.equals("Autumn")){
            hrizantemi = 3.70;
            rozi = 4.50;
            laleta = 4.15;
            if(countRozi >= 10){
                otstapkaZaBroi = 0.10;
            }
        }
        if((countHrizantemi + countLaleta + countRozi > 20)){
             otstapkaZaBroiNadDvaise = 0.20;
        }
        else{
            otstapkaZaBroiNadDvaise = 0.00;
        }
        double price = (countHrizantemi * hrizantemi) + (countRozi * rozi) + (countLaleta * laleta) ;
        double discountPrice = (price - (price * otstapkaZaBroi)) - (price * otstapkaZaBroiNadDvaise);
        if(holiday.equals("Y")){
            discountPrice = (price + (price * 0.15)) - (price * otstapkaZaBroi)- (price * otstapkaZaBroiNadDvaise)  ;

        }
        else{
            discountPrice = (price - (price * otstapkaZaBroi)) - (price * otstapkaZaBroiNadDvaise);

        }
        discountPrice = discountPrice + 2;
        System.out.print(discountPrice);








    }
}

Мерси за отговорите стигнах до тук проблема е, че не знам как се форматира в джавата примерно 34.04 да изкарва

System.out.printf("%.2f", discountPrice);

using System;

namespace flowersNew
{
	class MainClass
	{
		public static void Main(string[] args)
		{
			int countChrysanthemums = int.Parse(Console.ReadLine());
			int countRoses = int.Parse(Console.ReadLine());
			int countTulips = int.Parse(Console.ReadLine());
			string season = Console.ReadLine();
			string holiday = Console.ReadLine();
			var Chrysanthemums = 0.0;
			var Roses = 0.0;
			var Tulips = 0.0;
			var OtstapkaTulips = 0.0;
			var OtstapkaRoses = 0.0;
			var OtstapkaTwenty = 0.0;
			if (season == "Spring" || season == "Summer")
			{

				Chrysanthemums = 2.00;
				Roses = 4.10;
				Tulips = 2.50;

				if (countTulips > 7)
				{
					OtstapkaTulips = 0.05;

				}
				else { OtstapkaTulips = 0.0; }
				if (season == "Autumn" || season == "Winter")
				{

					Chrysanthemums = 3.75;
					Roses = 4.50;
					Tulips = 4.15;
					if (countRoses >= 10)
					{
						OtstapkaRoses = 0.10;

					}
					else {
						OtstapkaRoses = 0.0;
					}



				}


			}
			if ((countRoses + countTulips + countChrysanthemums) > 20)
			{
				OtstapkaTwenty = 0.20;
			}
			else { OtstapkaTwenty = 0.0; }
			var holidayPrice = 0.0;
			if (holiday == "Y")
			{
				holidayPrice = 0.15;
			}
			if(holiday == "N") { holidayPrice = 0.0;}

			var totalPrice = ((countRoses * Roses) + (countTulips * Tulips) + (countChrysanthemums * Chrysanthemums));
			var otstapkaHoliday = totalPrice + (totalPrice * holidayPrice);
			var otstapka = otstapkaHoliday - (otstapkaHoliday * OtstapkaTulips) - (otstapkaHoliday * OtstapkaRoses) - (otstapkaHoliday * OtstapkaTwenty);
			Console.WriteLine("{0:f2}",otstapka + 2 );

		}
	}
}

Отново се опитвам да реша задачата на C# ама нещо не ми се получава нЗа да изчисли правилно. 

Пробвай да кажеш, че са decimal:

            var Chrysanthemums = 1.0m;
            var Roses = 1.0m;
            var Tulips = 1.0m;
            var OtstapkaTulips = 1.0m;
            var OtstapkaRoses = 1.0m;
            var OtstapkaTwenty = 1.0m;
 

Не става.

Ами гледам, че варианта от Java и този на C# се различават. Разгледай си къде ти е грешката или промени работещият код от Java в C#-ски. Просто е...иска се досещане.

using System;

namespace flowersNew
{
	class MainClass
	{
		public static void Main(string[] args)
		{
			double countChrysanthemums = int.Parse(Console.ReadLine());
			double countRoses = int.Parse(Console.ReadLine());
			double countTulips = int.Parse(Console.ReadLine());
			string season = Console.ReadLine();
			string holiday = Console.ReadLine();
			double Chrysanthemums = 0.0;
			double Roses = 0.0;
			double Tulips = 0.0;
			double OtstapkaTulips = 0.0;
			double OtstapkaRoses = 0.0;
			double OtstapkaTwenty = 0.0;
			if (season == "Spring" || season == "Summer")
			{

				Chrysanthemums = 2.00;
				Roses = 4.10;
				Tulips = 2.50;

				if (countTulips > 7)
				{
					OtstapkaTulips = 0.05;

				}
				 



			}
			 if (season == "Autumn" || season == "Winter")
			{

				Chrysanthemums = 3.75;
				Roses = 4.50;
				Tulips = 4.15;

				if (countRoses >= 10 && season == "Winter")
				{
					OtstapkaRoses = 0.10;

				}




			}

			 
			double holidayPrice = 0.0;
			if (holiday == "Y")
			{
				holidayPrice = 0.15;
			}

			else if(holiday == "N") { holidayPrice = 0.0;}
			double totalFlowers = countRoses + countTulips + countChrysanthemums;
			if (totalFlowers > 20)
			{
				OtstapkaTwenty = 0.20;
			}

			double totalPrice = ((countRoses * Roses) + (countTulips * Tulips) + (countChrysanthemums * Chrysanthemums));
			double otstapkaHoliday = totalPrice + (totalPrice * holidayPrice);
			double discountTulips = otstapkaHoliday * OtstapkaTulips;
			double discountRoses = otstapkaHoliday * OtstapkaRoses;
			double discountTwenty = otstapkaHoliday * OtstapkaTwenty;
			double otstapka = otstapkaHoliday - discountRoses  - discountTulips - discountTwenty;
			Console.WriteLine("{0:f2}",otstapka + 2);
			 

		}
	}
}

До тук стигнах само последната проверка не мога да мина 62% взимам в judge.