Magic Pocket

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### Problem Statement Harry Potter has one biscuit and zero rupee in his pocket. He will perform the following operations exactly $K$ times in total, in the order he likes: - Hit his pocket, which magically increases the number of biscuits by one. - Exchange $A$ biscuits to $1$ rupee. - Exchange $1$ rupee to $B$ biscuits. Find the maximum possible number of biscuits in Harry's pocket af

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solution.cppC++17

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