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package offer;

public class offer_65 {

class Solution {

public int add(int a, int b) {

while(b != 0) { // 当进位为 0 时跳出

int c = (a & b) << 1; // c = 进位

a ^= b; // a = 非进位和

b = c; // b = 进位

}

return a;

}

}

}