Black FLag

using System;

namespace Black_Flag_01
{
    class Program
    {
        static void Main(string[] args)
        {
            int days = int.Parse(Console.ReadLine());
            int dailyPlunder = int.Parse(Console.ReadLine());
            double expectedPlunder = double.Parse(Console.ReadLine());

            double totalPLunder = 0;

            for (int i = 1; i <= days; i++)
            {
                totalPLunder += dailyPlunder;

                if (i % 3 == 0)
                {
                    totalPLunder += dailyPlunder * 0.5;
                }
                if (i % 5 == 0)
                {
                    totalPLunder *= 0.7;
                }
            }
            if (totalPLunder >= expectedPlunder)
            {
                Console.WriteLine($"Ahoy! {totalPLunder:F2} plunder gained.");
            }
            else
            {
                double precentage = totalPLunder / expectedPlunder * 100;
                Console.WriteLine($"Collected only {precentage} of the plunder.");
            }
        }
    }
}