`

LeetCode 67 - Add Binary

 
阅读更多

Given two binary strings, return their sum (also a binary string).

For example,
a = "11"
b = "1"
Return "100".

 

public String addBinary(String a, String b) {
    StringBuilder sb = new StringBuilder();
    int m = a.length()-1, n = b.length()-1;
    int carry = 0;
    while(m >= 0 || n >= 0) {
        int v1 = m<0?0:a.charAt(m--)-'0';
        int v2 = n<0?0:b.charAt(n--)-'0';
        int sum = v1+v2+carry;
        sb.append(sum%2);
        carry = sum/2;
    }
    if(carry!=0)
        sb.append(carry);
    return sb.reverse().toString();
}

 

 

分享到:
评论

相关推荐

Global site tag (gtag.js) - Google Analytics