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#include <cstdint>
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/**
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* 191. Number of 1 Bits
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* Write a function that takes an unsigned integer and returns the number of '1' bits it has (also known as the Hamming weight).
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*/
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class Solution {
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public:
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int hammingWeight(uint32_t n) {
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return __builtin_popcount(n);
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}
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};
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