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.
Note:
0 ≤ x
, y
< 231.
Example:
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.
struct Solution;
impl Solution {
fn hamming_distance(x: i32, y: i32) -> i32 {
let mut z = x ^ y;
let mut sum = 0;
for _ in 0..32 {
sum += z & 1;
z >>= 1;
}
sum
}
}
#[test]
fn test() {
assert_eq!(Solution::hamming_distance(1, 4), 2);
}