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

Solution: Maximum Frequency Stack

Explore how to design and implement a frequency-based stack that supports pushing elements and popping the most frequent element efficiently. Understand using hash maps to track frequencies and stacks to order elements by frequency, and learn to optimize both operations to achieve constant time complexity.

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, ...