0052_P201_Bitwise_AND_of_Numbers_Range.cpp

/* 
Day: 52
Problem Number: 201 (https://leetcode.com/problems/bitwise-and-of-numbers-range)
Date: 21-02-2024 
Description:
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 <= 2^31 - 1

Code:  */
class Solution {
public:
    int rangeBitwiseAnd(int left, int right) {
        while (left < right) {
            right &= (right - 1);
        }
        return right;
    }
};