64. GPIO State Enum

 Your task is to declare a scoped enum class named PinState with two values:

• Low
• High
   

Also, implement a function named toString(PinState s) that returns string "LOW" or "HIGH".

The program will read 0 or 1, map it to the enum, and print the state.

Example
 Input:

0

Output:

LOW

Input:

1

Output:

HIGH