LeetCode Daily: Sort by Number of 1 Bits 🔥

In this problem, we sort the array based on the number of 1s in each number’s binary representation.
If two numbers have the same number of 1 bits, then sort them in ascending order.

💡 Approach:

Count set bits using bit manipulation or built-in function.
Use a custom comparator to sort.

⏱ Time Complexity:
O(n log n)

🧠 Space Complexity:
O(1)

👍 Simple explanation + clean solution.
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