Last updated on October 9th, 2024 at 10:03 pm

Here, We see Add Binary LeetCode Solution. This Leetcode problem is done in many programming languages like C++, Java, JavaScript, Python, etc. with different approaches.

List of all LeetCode Solution

Add Binary LeetCode Solution

Problem Statement

Given two binary strings a and b, return their sum as a binary string.

Example 1:

Input: a = "11", b = "1"
Output: "100"

Example 2:

Input: a = "1010", b = "1011"
Output: "10101"

1. Add Binary Leetcode Solution C++

class Solution {
public:
    string addBinary(string a, string b) {
        if (a.size() < b.size())
            swap(a, b);
        int i = a.size(), j = b.size();
        while (i--) {
            if (j) a[i] += b[--j] & 1;
            if (a[i] > '1') {
                a[i] -= 2;
                if (i) a[i-1]++; else a = '1' + a;
            }
        }
        return a;        
    }
};

2. Add Binary Leetcode Solution Java

class Solution {
    public String addBinary(String a, String b) {
        StringBuilder sb = new StringBuilder();
        int i = a.length() - 1, j = b.length() -1, carry = 0;
        while (i >= 0 || j >= 0) {
            int sum = carry;
            if (j >= 0) sum += b.charAt(j--) - '0';
            if (i >= 0) sum += a.charAt(i--) - '0';
            sb.append(sum % 2);
            carry = sum / 2;
        }
        if (carry != 0) sb.append(carry);
        return sb.reverse().toString();        
    }
}

3. Add Binary Leetcode Solution JavaScript

var addBinary = function(a, b) {
    return (BigInt("0b"+a) + BigInt("0b"+b)).toString(2);    
};    

4. Add Binary Leetcode Solution Python

class Solution(object):
    def addBinary(self, a, b):
        return bin(eval('0b' + a) + eval('0b' + b))[2:]