Leetcode167: 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 i = 0;
while(n != m)
{
m>>=1;
n>>=1;
i++;
}
return m<<i;
}
};