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This article will explain in detail what the input sequence of a stack is 12345 and what the output sequence of the stack is. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

If the input sequence of a stack is 12345, the output sequence of the stack is: 54321. The characteristic of the stack is "first in and then out"; it stores data according to the principle of first in and then out, the first data is pressed into the bottom of the stack, the last data is at the top of the stack, and the data pops up from the top of the stack when you need to read the data (the last data is read out first).

Stack, also known as stack, is a linear table with limited operations. Qualifies linear tables that insert and delete only at the end of the table. This end is called the top of the stack, on the contrary, the other end is called the bottom of the stack. Inserting a new element into a stack is also called entering, entering, or pressing the stack. It puts the new element on top of the stack and makes it a new top element. Removing an element from a stack is also called making a stack or unstack. It removes the top element of the stack and makes its adjacent elements a new top element of the stack.

As a data structure, stack is a special linear table that can only insert and delete at one end. It stores data according to the first-in-first-out principle, the first-in data is pressed into the bottom of the stack, the last data is at the top of the stack, and the data pops up from the top of the stack when it needs to be read (the last data is read out first). The stack has the function of memory, and there is no need to change the pointer at the bottom of the stack in the insertion and deletion of the stack.

A stack is a special linear table that allows inserts and deletions on the same side. One end that allows insert and delete operations is called the top of the stack (top), and the other end is the bottom of the stack (bottom); the bottom of the stack is fixed, and the top of the stack is floating; 00:00 in the number of elements in the stack is called empty stack. Insertion is generally called PUSH, while deletion is called POP. The stack is also known as a first-in-first-out table.

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