//
// Created by 李洋 on 2023/8/19.
//
class Q2235 {
public:
    int sum(int num1, int num2) {
        while (num2) {
            unsigned int carry = (unsigned int) (num1 & num2) << 1;
            num1 ^= num2;
            num2 = carry;
        }
        return num1;
    }
};