Count Set Bits (Hamming Weight)

📝 Description

Count the number of 1 bits in an unsigned integer (binary representation).

Input Format

n (unsigned integer)

Output Format

count (integer)

Constraints

0 ≤ n ≤ 2^32 - 1

🔍 Sample Input

11 (binary: 1011)
            

✅ Sample Output

3