LeetCode Oj 67. Add Binary

最新推荐文章于 2020-11-20 14:06:11 发布

原创最新推荐文章于 2020-11-20 14:06:11 发布 · 485 阅读

0 ·

CC 4.0 BY-SA版权

leetcode 专栏收录该内容

19 篇文章

订阅专栏

本文介绍了一种解决两个二进制字符串相加的问题的方法。通过反转字符串并逐位进行加法运算，同时处理进位情况，最终得到正确的二进制结果。

67. Add Binary

My Submissions

Total Accepted: 92800
Total Submissions: 327327
Difficulty: Easy

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

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

Subscribe to see which companies asked this question

Show Tags

Show Similar Problems

Have you met this question in a real interview?

Yes

Discuss Pick One

class Solution {
public:
    string addBinary(string a, string b) {
         reverse(a.begin(),a.end());
         reverse(b.begin(),b.end());
         string ans="";
         int big=0;
         int len=max(a.length(),b.length());
         int x;
         int y;
         for(int i=0;i<len;i++)
         {
             if(i>=a.length()) x=0;
             else x=a[i]-'0';

             if(i>=b.length()) y=0;
             else y=b[i]-'0';
             ans=ans+(char)((x+y+big)%2+'0');
             big=x+y+big>1 ? 1:0;
         }
         if(big) ans=ans+"1";
         reverse(ans.begin(),ans.end());
         return ans;
    }
};