10. Profit

using System;

namespace _10._Profit
{
    class Program
    {
        static void Main(string[] args)
        {
            //Solution #1
            int oneLevCoins = int.Parse(Console.ReadLine());
            int twoLevCoins = int.Parse(Console.ReadLine());
            int fiveLevCoins = int.Parse(Console.ReadLine());
            int sum = int.Parse(Console.ReadLine());
            int currentSum = 0;

            for (int one = 0; one <= oneLevCoins * 1; one++)
            {
                for (int two = 0; two <= twoLevCoins * 2; two += 2)
                {
                    for (int five = 0; five <= fiveLevCoins * 5; five += 5)
                    {
                        currentSum = one + two + five;
                        if (currentSum == sum)
                        {
                            int onesCount = one / 1;
                            int twosCount = two / 2;
                            int fivesCount = five / 5;

                            Console.WriteLine($"{onesCount} * 1 lv. + {twosCount} * 2 lv. + {fivesCount} * 5 lv. = {currentSum} lv.");
                        }
                    }
                }
            }

            //Solution #2
            int oneLevCoins = int.Parse(Console.ReadLine());
            int twoLevCoins = int.Parse(Console.ReadLine());
            int fiveLevCoins = int.Parse(Console.ReadLine());
            int sum = int.Parse(Console.ReadLine());

            for (int one = 0; one <= oneLevCoins; one++)
            {
                for (int two = 0; two <= twoLevCoins; two++)
                {
                    for (int five = 0; five <= fiveLevCoins; five++)
                    {
                        if (one * 1 + two * 2 + five * 5 == sum)
                        {
                            Console.WriteLine($"{one} * 1 lv. + {two} * 2 lv. + {five} * 5 lv. = {sum} lv.");
                        }
                    }
                }
            }
        }
    }
}