Leetcode interview question 17.01 Addition without plus sign

Design a function to add two numbers . Do not use + Or other arithmetic operators .

Example :

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

Tips ：

• a, b Both can be negative or 0
• The result won't spill 32 An integer

source ： Power button （LeetCode）
link ：https://leetcode.cn/problems/add-without-plus-lcci
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Code:

class Solution { 
    
public