Problem #86 MEDIUM
The Lazy Librarian's Stack
Amazon Apple Invariants Logic
Problem Statement
A librarian has a stack of 8 books. She can only perform one operation: take any single book from anywhere in the stack and move it to the top. What is the minimum number of moves to sort the stack into alphabetical order, given the current order from top to bottom is: G, C, F, A, H, B, E, D?
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