DSA Section簡単

Stack using Linked List

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

問題提起

簡単

Write a function execute_stack_linked_list(operations) that simulates a Stack using a singly linked list. The input is a list of tuples operations where each tuple is either ("push", val) or ("pop",). Return a list of popped values. If popping from an empty stack, return None.

制約
  • 0 <= len(operations) <= 1000

Example 1
Input
operations = [("push", 10), ("push", 20), ("pop",)]
Output
[20]
Explanation

Push 10, push 20. Pop returns the top element 20.

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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