LeetCode 3370: Smallest Number With All Set Bits Solution

Master LeetCode problem 3370 (Smallest Number With All Set Bits), a easy 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.

3370. Smallest Number With All Set Bits

Easy

Math Bit Manipulation

Problem Explanation

Explanation:

To find the smallest number with all set bits greater than or equal to a given number n, we can follow these steps:

Find the most significant bit position of n with a set bit.
Create a mask with all bits set from the most significant bit position to the least significant bit position.
Increment this mask to get the smallest number that satisfies the condition. :

Solution Code

class Solution {
    public int smallestNumberWithAllSetBits(int n) {
        int msb = 0;
        while ((1 << msb) <= n) {
            msb++;
        }
        return (1 << msb) - 1;
    }
}

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