Solution: Maximum Frequency Stack
Explore how to design a frequency stack data structure that supports constant time push and pop. Learn to track element frequencies and efficiently retrieve the most frequent element, resolving ties by recency. This lesson helps you understand the optimal solution using hash maps and stacks to solve a common interview problem.
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 class that should consist of the following:
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FreqStack: This is a class 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, ...