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The main content of this article is "how to solve the stack problem". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to solve the stack problem.

Problem description

Stack is often encountered in learning at ordinary times, but what is stack in the end and what is its application in life?

Solution

In the data structure, the stack is a container for storing data elements, which can be stored or taken out. Access operations are also supported, including viewing.

Since it is a container, you must have an in-depth understanding of its use in order to know how it is applied; the structure of the stack only needs to ensure the order in which elements are stored and taken out. There is no need to record or guarantee any relationship between the newly stored elements and the container, and to ensure the principle of last-in, first-out elements. Such as folding plates, wearing and undressing, and so on.

Stack is a simple data structure used to store data, which is somewhat similar to linked lists or sequential tables (collectively referred to as linear tables). The biggest difference between stacks and linear tables is the operation of data access. We can think of stack as a special linear table, whose insertions and deletions only allow one end of the online table to be carried out. Generally speaking, the end that allows operation is called the top of the stack, and the inoperable end is called the bottom of the stack. Delete operations are called on-stack and off-stack, respectively. To enter the stack is to store a data element at the top of the stack, and to exit the stack is to take out the element at the top of the stack. In the figure, A1 is called the bottom element of the stack, and an is the top element of the stack. If there are no elements in the stack, it is called an empty stack.

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