Mirror Reflection LeetCode solution in C++

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class Solution {
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 public:
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  int mirrorReflection(int p, int q) {
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    while (p % 2 == 0 && q % 2 == 0) {
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      p /= 2;
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      q /= 2;
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    }
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    return 1 - p % 2 + q % 2;
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  }
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};