Stella is running a sandwich boutique. Almost all the people of the city are busy and they don't get time to make breakfast, so all of them rely on her for breakfast. Stella really makes very delicious sandwiches. Recently teenagers are also visiting Stella's sandwich boutique often. Because of more number of visitors Stella is becoming tired quickly. Her sandwich making and serving speed drops down immediately when she becomes tired. If she doesn't serve more customers, she will not be able to earn more money, and her dream of building a big restaurant will remain a dream forever. We hope you will come forward and help Stella to serve all her customers.