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class Solution {

/*

* param a: The first integer

* param b: The second integer

* return: The sum of a and b

*/

public int aplusb(int a, int b) {

if (b == 0) {

return a;

}

int sum = a ^ b; // add without carry

int carry = (a & b) << 1; // carry without sum;

return aplusb(sum, carry);

}

};