Hamming Distance LeetCode solution in C++

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class Solution {
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 public:
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  int hammingDistance(int x, int y) {
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    int res = 0;
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    int num = x ^ y;
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    while (num) {
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      res += num % 2;
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      num >>= 1;
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    }
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    return res;
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  }
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};