leetcode 371. Sum of Two Integers
Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.Example 1:
Input: a = 1, b = 2
Output: 3
Example 2:
Input: a = -2, b = 3
Output: 1
class Solution {
public int getSum(int a, int b) {
if(a == 0) return b;
if(b == 0) return a;
while(b != 0){
int carry = a & b;
a = a ^ b;
b = carry << 1;
}
return a;
}
}
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