Marys_Homemade_Cupcakes

You have just opened a cupcake bakery and you are in charge of the cupcake section. Everyday you bake n no. of cupcakes at the bakery. There is a huge queue for buying the cupcakes. There can be more people than you can serve so some might have to return empty handed. You are serving each customer one after the another. Each customer wants some number of cupcakes. If you can serve that customer