[LeetCode] 201. Bitwise AND of Numbers Range

 Problem : https://leetcode.com/problems/bitwise-and-of-numbers-range/

class Solution:
    def rangeBitwiseAnd(self, m: int, n: int) -> int:
        
        mask = 0xFFFFFFFF
        
        while (m & mask) != (n & mask):
        
            # shift mask to left with one bit
            # to set m and n one more bit on right to 0
            mask <<= 1
        
        return m & mask