tripski

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

namespace Sea_Trip
{
    class Program
    {
        static void Main(string[] args)
        {
            double moneyForFood = double.Parse(Console.ReadLine());
            double moneyForSuvenirs = double.Parse(Console.ReadLine());
            double moneyForHotel = double.Parse(Console.ReadLine());


            double razhodBenzin = (420 / 100);
            double razhodBenzinDve = razhodBenzin * 7;

            double neededMoneyForBenzin = razhodBenzinDve * 1.85;

            double prestoi = 3;
            double priceForFoodAndSuvenirs = prestoi * moneyForFood + prestoi * moneyForSuvenirs;

            double prestoiPurviDenPracentDiscount = moneyForHotel * 0.10;
            double prestoiPurvDen = moneyForHotel - prestoiPurviDenPracentDiscount;

            double vtoriDenDiscount = moneyForHotel * 0.15;
            double prestoiVtoriDen = moneyForHotel - vtoriDenDiscount;

            double tertiDenDiscount = moneyForHotel * 0.20;
            double prestoiTretiDen = moneyForHotel - tertiDenDiscount;

            double totalSum = neededMoneyForBenzin + priceForFoodAndSuvenirs + prestoiPurvDen + prestoiVtoriDen + prestoiTretiDen;

            Console.WriteLine($"Money needed: {totalSum:f2}");
        }
    }
}