Solution: Maximum Frequency Stack
Explore how to build a frequency stack that supports push and pop operations to retrieve the most frequent element efficiently. Understand the use of hash maps and stacks to track frequencies and recentness, and compare naive and optimized approaches to solve the problem with constant time complexity for core operations.
Statement
Design a stack-like data structure. You should be able to push elements to this data structure and pop elements with maximum frequency.
You’ll need to implement the FreqStack struct that should consist of the following:
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FreqStack: This is a struct used to declare a frequency stack.
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Push(value): This is used to push an integer data onto the top of the stack.
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Pop(): This is used to remove and return the most frequent element in the stack.
Note: If there is a tie for the most frequent element, then the most recently pushed element is removed and returned.
Constraints:
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value -
At most, ...