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

Solution: Maximum Frequency Stack

Explore how to design and implement a maximum frequency stack that allows pushing elements and popping the most frequent one efficiently. Understand the optimized approach using frequency hash maps and group stacks to track element occurrences, achieving O(1) time complexity for push and pop operations. Learn to apply these techniques to solve complex stack problems in coding interviews.

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 struct that should consist of the following:

  • FreqStack: This is a struct 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, 2×1032 \times 10^3 ...