leetcode --67. Add Binary

题目：https://leetcode.com/problems/add-binary/tabs/description

代码：

class Solution {public:    string addBinary(string a, string b) {        int i = a.size()-1,j = b.size()-1,temp=0;        string c;        while(i>=0|j>=0|temp==1){            if(i>=0){                temp+=a[i--]-'0';            }            if(j>=0){                temp+=b[j--]-'0';            }            c+=char(temp%2+'0');            temp=temp/2;        }        reverse(c.begin(),c.end());        return c;    }};