DSA SectionEasy

Stack using Array

Detailed guide and Python implementation for the 'Stack using Array' problem.

Problem Statement

Easy

Write a function execute_stack_operations(operations) that simulates a Stack using an array. The input is a list of tuples operations where each tuple is either ("push", val) or ("pop",). Return a list of popped values.

Constraints
  • 0 <= len(operations) <= 1000

Examples

Example 1
Input
operations = [("push", 1), ("push", 2), ("pop",), ("push", 3), ("pop",)]
Output
[2, 3]
Explanation

Push 1, push 2. Pop returns 2. Push 3. Pop returns 3. Pops list is [2, 3].

Need a Hint?
Consider using Stacks-specific data structures like sets or heaps.
Edge Cases to Watch
  • Empty input structures
  • Single element inputs
  • Large numerical bounds

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