# Ibrahim Hasnat

## Recursion | An Awesome Method for Solving Problems

Before getting into details, you don’t need to be disappointed if you don’t understand the recursion quickly. Initially, it may seem a bit complex or fuzzy...

## Overview of Python Dictionary | Data Structure

Dictionary in Python is a data structure. Dictionary is similar to HashTable with some extra features. HashTable is one of the most important data structures in...

## Number of Islands | LeetCode 200 | Python | Solution

LeetCode 200 The number of islands is one of the most popular programming problems. Read the problem description first. Before getting into the solution, I assume...

If you are a self-learner, especially a computer programmer or developer, keep the following things in mind. I think keeping these in mind will help you....

## Binary Search Tree | Data Structure

Before getting into the Binary Search Tree (BST), you have to know the basics of Tree and Binary Tree. I assume that you have the basic...

## Same Tree | LeetCode 100 | Python | Solution

LeetCode 100 It’s an easy LeetCode problem, and the description is concise and straightforward. We can solve this problem using the DFS algorithm. From two binary...

## Kth Smallest Element in a BST | LeetCode 230 | Python | Solution

LeetCode 230 I hope you already know about Binary Search Tree. In BST, each node is greater than its left subtree and smaller than its right...

## Binary Tree Level Order Traversal | LeetCode 102 | Python | Solution

LeetCode 102 This problem just simply the implementation of the level order traversal algorithm. If you don’t know about level order traversal yet, you can check...