Princess Security

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Princess Princy lives in a castle. Princy wants maximum security, so she enables "two factor authentication" for her castle. At entry gate, the entrant has to provide a integer $r$, which serves as their password. This authentication occurs in two steps: **Step 1**: We compute four integers: `a = r XOR 3, b = r XOR 31, c = r XOR 18`, and `d = r XOR 16`. **Step 2**: We compute two integers

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solution.cppC++17

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