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Vector Double Ended Queue

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OpenAI

Imagine you have a bunch of toy cars that you want to play with. You can't play with all of them at once, so you need to put some of them away and take them out later. You also want to make sure you can quickly grab the first car you put away when you want to play with it again.

A VecDeque is like a toy box with two lids, one on each end. You can put your toy cars into the toy box from one end, and take them out from the other end. When you put a car into the toy box, it goes to the back of the line. When you take a car out of the toy box, you take it from the front of the line. This means that the first car you put away is also the first one you can take out again.

The "Vec" in "VecDeque" stands for "vector", which is a fancy word for a list of things. The "Deque" in "VecDeque" stands for "double-ended queue", which is another fancy word for a line where you can add and remove things from both ends.

So a VecDeque is like a list of things where you can add and remove things from both ends. In the toy car example, you can think of it like a toy box where you can add and remove cars from both ends, and the first car you put away is always the first one you can take out again.


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