easyBlind 75
Number of 1 Bits
Count the number of 1 bits in the binary representation Example: 11 (binary: 1011) => 3
The trick is `n &= n - 1`, which clears the lowest set bit. I loop once per one-bit instead of walking all thirty-two.
Bit Manipulation
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1Number of 1 Bitseasy
Based onLeetCode