Hamming Distance LeetCode Solution

Problem – Hamming Distance

The Hamming distance between two integers is the number of positions at which the corresponding bits are different.

Given two integers x and y, return the Hamming distance between them.

Example 1:

Input: x = 1, y = 4
Output: 2
Explanation:
1   (0 0 0 1)
4   (0 1 0 0)
       ↑   ↑
The above arrows point to positions where the corresponding bits are different.

Example 2:

Input: x = 3, y = 1
Output: 1

Constraints:

  • 0 <= x, y <= 231 - 1

Hamming Distance LeetCode Solution in Java

public class Solution {
    public int hammingDistance(int x, int y) {
        return Integer.bitCount(x ^ y);
    }
}

Hamming Distance LeetCode Solution in C++

class Solution {
public:
    int hammingDistance(int x, int y) {
        int dist = 0, n = x ^ y;
        while (n) {
            ++dist;
            n &= n - 1;
        }
        return dist;
    }
};

Hamming Distance LeetCode Solution in Python

    def hammingDistance(self, x, y):
        """
        :type x: int
        :type y: int
        :rtype: int
        """
        return bin(x^y).count('1')
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