201. Bitwise AND of Numbers Range

Medium

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Given two integers left and right that represent the range [left, right], return the bitwise AND of all numbers in this range, inclusive.

Example 1:

Input: left = 5, right = 7
Output: 4

Example 2:

Input: left = 0, right = 0
Output: 0

Example 3:

Input: left = 1, right = 2147483647
Output: 0

Constraints:

• 0 <= left <= right <= 231 - 1

class Solution:
    def rangeBitwiseAnd(self, left: int, right: int) -> int:
        # Totally Math logic 
        # https://www.youtube.com/watch?v=-qrpJykY2gE&ab_channel=TECHDOSE
        s = 0
        while left != right:
            left = left >> 1
            right = right >> 1
            s += 1
        return left << s