Gringotts!
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One day Helix, a rather unusual customer, visits Gringotts. Griphook the goblin is startled upon hearing the vault number the customer wants to access. The requested vault number in its binary form has all its bits set. Griphook has a special cart that can transport him from one vault to another. Let’s say the vault they currently are is 18. By performing an operation on the binary form of 18:
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solution.cppC++17
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