A deque is a data structure consisting of a list of items on which the following operations are possible:(a)push(x, d): Insert itemx on the front end of the dequed.(b)pop(d): Remove the front item from dequed and return it.(c)inject(x, d): Insert itemx on the rear end of dequed.(d)eject(d): Remove the rear item from dequed and return it. Choose a proper representation and write functions that take O(1) time to support each of the above operations.

How to launch an app: steps to be successful? launching an app is a great idea, but it’s not that easy as we supposed to think. the majority of mobile applications don’t generate revenue because companies aren’t ready to be competitive. referring to our experience in successfully building and launching apps we hope to you omit these difficulties. we are going to talk about ideas, marketing, testing your product, its development, distribution and support. you will learn 8 product launch stages to succeed.

People with high self-esteem: accept their strengths and weaknesses. believe that failed experiences are failures of their whole self. feel good about who they are only when they reach total success. need positive external experiences to counteract negative feelings that constantly plague them.

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