Sum of Two Integers

Sum of Two Integers

Given two integers a and b, return the sum of the two integers without using the operators + and -.

Examples

Example 1:

Input: a = 1, b = 2
Output: 3

Example 2:

Input: a = 2, b = 3
Output: 5

Example 3:

Input: a = -1, b = 1
Output: 0

Constraints

• -1000 <= a, b <= 1000

Expected Complexity

• Time: O(1). at most 32 iterations for 32-bit integers
• Space: O(1)