LeetCode 3125: Maximum Number That Makes Result of Bitwise AND Zero Solution

Master LeetCode problem 3125 (Maximum Number That Makes Result of Bitwise AND Zero), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

3125. Maximum Number That Makes Result of Bitwise AND Zero

Medium

String Greedy Sorting

Problem Explanation

Explanation:

To solve this problem, we need to find the maximum number that can be obtained such that the result of bitwise AND of all numbers from 1 to that maximum number is zero.

We need to find the maximum number "x" such that the bitwise AND of all numbers from 1 to x is zero.
We can observe that if we have a number "y" where all the bits are set to 1 up to a certain position, then the bitwise AND of all numbers from 1 to y will have all bits set to 0 from that position onwards.
Therefore, we can start from the most significant bit and iterate through each bit position. If setting the bit to 1 in the current position does not exceed the target number "n", we can set that bit to 1. Otherwise, we keep it as 0.
By following the above approach, we can find the maximum number that satisfies the condition.

Solution Code

class Solution {
    public int findMaximumXOR(int n) {
        int result = 0;
        int bit = 1 << 30;
        while ((n & bit) == 0) {
            bit >>= 1;
        }
        while (bit > 0) {
            result |= bit;
            bit >>= 1;
        }
        return result;
    }
}

Try It Yourself

Loading code editor...

Frequently Asked Questions

How to solve LeetCode 3125 (Maximum Number That Makes Result of Bitwise AND Zero)?

This page provides optimized solutions for LeetCode problem 3125 (Maximum Number That Makes Result of Bitwise AND Zero) in Java, C++, and Python, along with a detailed explanation and an interactive code editor to test your code.

What is the time complexity of LeetCode 3125 (Maximum Number That Makes Result of Bitwise AND Zero)?

The time complexity for LeetCode 3125 (Maximum Number That Makes Result of Bitwise AND Zero) varies by solution. Check the detailed explanation section for specific complexities in Java, C++, and Python implementations.

Can I run code for LeetCode 3125 on DevExCode?

Yes, DevExCode provides an interactive code editor where you can write, test, and run your code for LeetCode 3125 in Java, C++, or Python.

Back to LeetCode Solutions