FixedCode

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

namespace Парична_награда
{
    class Program
    {
        static void Main(string[] args)
        {
            int partsProjects = int.Parse(Console.ReadLine());
            double priceForPoint = double.Parse(Console.ReadLine());
            var sum = 0;

            var TotalPrice = 0.0;
            for (int i = 1; i <= partsProjects; i++)
            {
                var points = int.Parse(Console.ReadLine());

                if (i % 2 == 0)
                {
                    // SUKRATENO
                    points *= 2;

                }

                sum += points;
            }

            TotalPrice = (sum * priceForPoint);

            Console.WriteLine($"The project prize was {TotalPrice:F2} lv.");
        }
    }
}