Given two integers, return their sum without using the + or - operators.

Note: While a simple solution using + works technically, this problem is meant to teach bitwise operations. Avoid using +, -, or built-in addition functions. Use bitwise XOR and AND operations instead.

Example

Example 1

Input:  a = 5, b = 3
Output: 8

Constraints

• Standard integer range
• You may not use + or - operators