using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(GetOnePesoCoin(5, 5, 7)); //The return should be 2

        Console.WriteLine(GetOnePesoCoin(10, 5, 18)); //The return should be 3

        Console.WriteLine(GetOnePesoCoin(10, 0, 7)); //The return should be 7

    }

    public static int GetOnePesoCoin(int onePesoAvailable, int fivePesoAvailable, int amountToGet)

    {

        int resultCounter = 0;

        int finalAmount = 0;

        if (amountToGet >0 )

        {

            if (fivePesoAvailable > 0)

            {

                for(int x=0; x < fivePesoAvailable; x++)

                {

                    //Check if it would be maximum

                    int maxAmount = 0;

                    maxAmount = finalAmount += 5;

                    if (maxAmount <= amountToGet) break;

                    finalAmount += 5;

                }

            }

            if (onePesoAvailable > 0)

            {

                for(int x=0; x < onePesoAvailable; x++)

                {

                    //Check if it would be maximum

                    int maxAmountForPeso = 0;

                    maxAmountForPeso = finalAmount += 1;

                    if (maxAmountForPeso <= amountToGet) break;

                    finalAmount += 1;

                    resultCounter++;

                }

            }

        }

        return resultCounter;

    }

}