Suppose subs are sold for $$10$ each at a local shop. Every sub purchased comes with a coin.

Once you have collected $10$ coins, you can exchange them for one free sub from the shop.

Your goal is to determine the total number of subs you can get, including those obtained through exchanging coins, given n dollars to spend.

For instance, if the user inputs $$100,$ they can initially buy $10$ subs, thereby receiving $10$ coins, which are enough to get $1$ more sub for free. Thus, with $$30,$ the user can get a total of $11$ subs and will have $1$ coin left over.

python and c$++$