Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns

Solution: Maximum Frequency Stack

Explore how to design and implement a frequency stack that supports pushing elements and popping the most frequent item efficiently. Understand the naive heap approach and an optimized stack-based method for constant time push and pop operations while managing element frequencies.

We'll cover the following...

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:

  • FreqStack: This is a class used to declare a frequency stack.

  • Push(value): This is used to push an integer data onto the top of the stack.

  • 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:

  • 0≤0 \leq value ≤104\leq 10^4

  • At most, ...