So are these just copied from leetcode? For example, leetcode's hamming distance versus yours: LeetCode: The Hamming distance between two integers is the numb

So are these just copied from leetcode? For example, leetcode's hamming distance versus yours: LeetCode: The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Given two integers x and y, calculate the Hamming distance. Yours: 1)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, calculate the Hamming distance. Another one, LeetCode: Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? Yours: 2)Single Number Given an array of integers, every element appears twice except for one. Find that single one. Note:Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?