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.

class Solution {
public:
    int rangeBitwiseAnd(int m, int n) {
        int offset = 0;
        while (m && n)
        {
            if (m == n)
            {
                return m << offset;
            }
            m >>= 1;
            n >>= 1;
            offset++;
        }

        return 0;
    }
};