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This article is to share with you how to understand the serialization of python binary tree. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article. Let's take a look at it with the editor.

Design an algorithm to serialize and deserialize a binary tree.

Explanation: serialization means turning some specific structures in memory into strings with formatted information.

For example, for linked lists, we can serialize linked lists such as 1-> 2-> 3-> NULL to "1Jing 2Jue 3". For serialization algorithms, deserialization must be supported, and strings that meet the format requirements can be reconstructed into the desired structure in the agreed format.

A:

Use BFS. For the following binary tree:

one

/\

2 3

/\

4 5

The order of BFS is: [1, 2, 3, 4, 5]. If we represent the left and right sons of the leaf node as #, we can get the following tree:

one

/\

2 3

/ /

# # 4 5

/ /

# #

One line at a time, you can get it: [1]

Remove the continuous # at the tail, and you can get [1, BFS, 2, 3, 4, 5], which completes the serialization using BFS.

Similarly, we can also use DFS for serialization, and the result of DFS serialization is as follows: [1) the result of DFS serialization is as follows: [1] the result of DFS serialization is longer than that of BFS serialization. The main reason is that most of the # appears at the bottom, so the BFS approach allows as many # as possible at the end of the serialization.

Interviewer's point of view:

The so-called serialization is to turn something structured into a flat string. This can facilitate transmission and compression and so on. The method of using BFS or DFS is correct in the interview, but you can get extra points if you can compare the BFS method to save space more effectively.

The above is how to understand the serialization of python binary tree. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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