Stack using Linked List | GeeksforGeeks GFG Solution in C++ | Stack Implementation | DSA

In this video, we solve the GeeksforGeeks problem "Stack using Linked List".

🔗 Problem Link:
https://www.geeksforgeeks.org/problems/implement-stack-using-linked-list/1?sortBy=submissions&category%255B%255D=Stack&page=1&difficulty%255B%255D=-1

📌 Problem Statement:

Implement a Stack using a Linked List.
This stack has no fixed capacity and can grow dynamically until memory is available.

The stack should support the following operations:

👉 push(x) : Insert element x at the top
👉 pop() : Remove the top element
👉 peek() : Return the top element
👉 isEmpty() : Check whether stack is empty
👉 size() : Return number of elements in the stack

You only need to implement these functions.

📌 Example:

Input:
q = 7
queries = [[1, 5], [1, 3], [1, 4], [3], [2], [5], [4]]

Output:
[4, 2, false]

Explanation:

push(5)
push(3)
push(4)

peek() returns 4

pop() removes 4

size() returns 2

isEmpty() returns false

🎯 In this video you will learn:

✔ How to implement stack using linked list
✔ Push and pop operations in linked list
✔ Dynamic memory allocation in stack
✔ Efficient O(1) stack operations
✔ Important interview problem on stack and linked list

💻 Language Used: C++
📚 Platform: GeeksforGeeks
📂 Topic: Stack / Linked List

Tags:
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