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Serialize and Deserialize Binary Tree

Medium

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Design an algorithm to serialize and deserialize a binary tree.

Sample Input:

[1,2,3,null,null,4,5]

Sample Output:

[1,2,3,null,null,4,5]

Hints

Hint 1

Use preorder traversal for serialization

Hint 2

Mark null nodes with special character

Hint 3

Use recursion for deserialization

Code Editor

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