The Queue data structure in a nutshell

Introduction to Data Structures for Interviews: Stack And Queue

Write a program to insert or delete an element from a queue depending upon user's choice.

Chester See on Instagram: "Longest queue I’ve ever seen at Sydney airport’s security queue due to the long weekend & mid school holidays. I had only 15 minutes till boarding too and of course my gate is all the way at the other end of the terminal, plus I need to clear immigration. Check in took at least 30 minutes due to long lines too so going early wouldn’t have helped the situation. Thankfully Sydney airport staff called passengers in the queue who are boarding in the next 45 minutes to skip