Design and implementation of a special kind of stack called a MinStack. The MinStack supports the usual stack operations such as push, pop, and top, but it also provides a method to retrieve the minimum element in constant time, O(1).

You are keeping the scores for a baseball game with a unique set of rules. At the beginning of the game, you start with an empty record. You're given a list of strings operations, where each element represents an operation to apply to the record.