This post is about Stack, its definition, operations, and applications.

This post is about LinkedList, its definition, operations, and applications.

Explanation for Leetcode 572 - Subtree of Another Tree problem, and its solution in Python.

Explanation for Leetcode 543 - Diameter of Binary Tree problem, and its solution in Python.

Explanation for Leetcode 226 - Invert Binary Tree problem, and its solution in Python.

Explanation for Leetcode 110 - Balanced Binary Tree problem, and its solution in Python.

Explanation for Leetcode 104 - Maximum Depth of Binary Tree problem, and its solution in Python.

Explanation for Leetcode 100 - Same Tree problem, and its solution in Python.

This post is about Array, different types of Array, and its basic operations.

Explanation for Leetcode 21 - Merge Two Sorted Lists problem, and its solution in Python.