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.

int rangeBitwiseAnd(int m, int n) 
{
    int i = 31;
    int tmp = 1;
    
    while(i>=0)
    {
        tmp = 1<<i;
        if( (m&tmp) == (n&tmp) )
            i--;
        else
            break;
    }
    
    return (m>>(i+1))<<(i+1);
}