Tree Serialization and Deserialization

Implement methods to serialize and deserialize a binary tree. Serialization is the process of converting a tree to a string, and deserialization is the reverse process. Input: - The first line contains an integer n, the number of nodes in the binary tree. - The next n lines contain node values in a level order traversal (use -1 for null nodes). Output: - Output the serialized string and then deserialize it back and print the confirmation that the structure is preserved. Example: Input: 5 1 2 3 -1 -1 -1 -1 Output: 1,2,3,null,null,null,null Successfully deserialized back to original structure.