Interview Course Based on Story Questions

# Problem statement
For this challenge, you are given a *binary tree*, and you have to implement two functions: 
- `serializer()`, This will **serialize** a binary tree into string.
-  `deserializer()`, This will **deserialize** the string into a binary tree. 

There are no restrictions on how your serialization/deserialization algorithm should work. You just need to ensure that a binary tree can be serialized to a string, and this string can be deserialized to the original tree structure.

## Input
The input for the `serializer()` function will be the `root` node of the binary tree containing **integer** values. The input for the `deserializer()` function will be the string created as  the `serializer()` function's output. Let's say the following tree has to be serialized:  


DIY: Serialize and Deserialize Binary Tree

Problem statement