2235_AddTwoIntegers - a920604a/leetcode GitHub Wiki
title: 2235. Add Two Integers
categories: leetcode
comments: false
solution
option 1 - native
class Solution {
public:
int sum(int num1, int num2) {
return num1+num2;
}
};
option 2 - without +
class Solution {
public:
int sum(int num1, int num2) {
while(num2!=0){
unsigned int total = num1^num2;
unsigned int carry = num1&num2;
num1 = total;
num2 = carry<<1;
}
return num1;
}
};
class Solution {
public:
int sum(int num1, int num2) {
while(num2){
int carry = (num1&num2&0x7fffffff)<<1, total = num1^num2;
num2 = carry, num1 = total;
}
return num1;
}
};