Leetcode 201: Bitwise AND of Numbers Range

Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive.

For example, given the range [5, 7], you should return 4.

 

public class Solution {
    public int RangeBitwiseAnd(int m, int n) {
        if(m == 0){
            return 0;
        }
        
        int moveFactor = 1;
        while(m != n){
            m >>= 1;
            n >>= 1;
            moveFactor <<= 1;
        }
        
        return m * moveFactor;   
    }
}