Timer is Running

Serialization is to store a tree in an array so that it can be later restored and Deserialization is reading tree back from the array. Now your task is to complete the function serialize which stores the tree into an array A[ ] and deSerialize which deserializes the array to tree and returns it.
Note: The structure of tree must be maintained.

First line of input contains the number of test cases T. For each test case, there will be only a single line of input which is a string representing the tree as described below: 

  1. The values in the string are in the order of level order traversal of the tree where, numbers denotes node values, and a character “N” denotes NULL child.

  2. For example:

    For the above tree, the string will be: 1 2 3 N N 4 6 N 5 N N 7 N

The output in the expected output will be the inorder traversal of the returned tree.

Your Task:
The task is to complete two function serialize which takes the root node of the tree as input andstores the tree into an array and deSerialize which deserializes the array to the original tree and returns the root of it.

Expected Time Complexity: O(N).
Expected Auxiliary Space: O(N).

1 <= T <= 100
1 <= Number of nodes <= 1000
1 <= Data of a node <= 1000


1 2 3
10 20 30 40 60
2 1 3
40 20 60 10 30

Testcase 1: Given tree is 
                       /         \
                     2           3
Hence , the given output is 2 1 3.
Testcase 2: Given tree is 
                       /       \
                     20      30
                  /        \
                40      60
Hence, the given output is 40 20 60 10 30.

Note: The Input/Ouput format and Example given above are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console, and should not print anything on stdout/console. The task is to complete the function specified, and not to write the full code.

** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Suman Rana
Author: Shubham Joshi 1

If you have purchased any course from GeeksforGeeks then please ask your doubt on course discussion forum. You will get quick replies from GFG Moderators there.

Need help with your code? Please use ide.geeksforgeeks.org, generate link and share the link here.

to report an issue on this page.