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Binary Tree Recursion in Interviews: The Call Stack Diagnostic

Prakhar Srivastava3d ago • 7 min read

Binary Tree Recursion in Interviews: The Call Stack Diagnostic

I've watched plenty of engineers explain binary tree traversals on a whiteboard and then freeze five...

#learning#leetcode#interview#algorithms

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Binary Tree Interview Problems: 6 Traversal Patterns, 15 Problems

Prakhar Srivastava4d ago • 7 min read

Binary Tree Interview Problems: 6 Traversal Patterns, 15 Problems

The default tree prep is sorting LeetCode's tree tag by acceptance rate, doing the top 40, and hopin...

#algorithms#career#leetcode#beginners

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Big O Notation Explained: Derive It, Don't Memorize It

Prakhar Srivastava6d ago • 7 min read

Big O Notation Explained: Derive It, Don't Memorize It

You can recite that binary search is O(log n) and nested loops are O(n²). That recitation stops...

#leetcode#career#algorithms#interview

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Binary Search Tree Explained: All Operations From One Rule

Prakhar Srivastava4d ago • 7 min read

Binary Search Tree Explained: All Operations From One Rule

Most BST tutorials teach search, insert, and delete as three procedures. You memorise one, then the....

#algorithms#career#leetcode#datastructures

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BFS vs DFS: The Invariant Decides, Not Your Preference

Prakhar SrivastavaMay 22, 2026 • 5 min read

BFS vs DFS: The Invariant Decides, Not Your Preference

Two algorithms visit every node in a graph. Pick whichever you remember and most of the time nothing...

#algorithms#leetcode#career#programming

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Aryan Subudhi4d ago • 6 min read

LeetCode Solution: 1. Two Sum

Cracking LeetCode 1: Two Sum - Your First Step into Algorithm Mastery! Hey everyone! 👋...

#leetcode#dsa#programming#tutorial

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LeetCode Solution: 5. Longest Palindromic Substring

Aryan Subudhi4d ago • 6 min read

LeetCode Solution: 5. Longest Palindromic Substring

5. Longest Palindromic Substring: Unraveling the Palindromic Puzzle 🧩 Hey fellow coders! 👋...

#leetcode#dsa#programming#tutorial

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I Solved 512+ LeetCode Problems, and Here’s What I Learned 🧠

Gregory5d ago • 2 min read

I Solved 512+ LeetCode Problems, and Here’s What I Learned 🧠

Hi everyone, my name is Greg. I've been working in web development since 2020. A few years ago, I...

#leetcode#programming#algorithms#computerscience

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Aryan Subudhi5d ago • 6 min read

LeetCode Solution: 6. Zigzag Conversion

Unraveling the Zigzag: A Beginner's Guide to LeetCode 6 (Zigzag Conversion) Hey LeetCoders...

#leetcode#dsa#programming#tutorial

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Tree Traversal: Why the Order You Pick Is a Data Flow Decision

Prakhar Srivastava1d ago • 5 min read

Tree Traversal: Why the Order You Pick Is a Data Flow Decision

Tree traversal usually gets taught as three separate algorithms to memorize: preorder, inorder,...

#leetcode#algorithms#career#learning

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LeetCode Solution: 1752. Check if Array Is Sorted and Rotated

Vansh Aggarwal6d ago • 7 min read

LeetCode Solution: 1752. Check if Array Is Sorted and Rotated

🔄 LeetCode 1752: Can You Un-Rotate This Array? (A Beginner's Guide) Hey there, fellow...

#leetcode#dsa#programming#tutorial

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LeetCode 747 in Java: Largest Number At Least Twice of Others Explained

Jerin5d ago • 2 min read

LeetCode 747 in Java: Largest Number At Least Twice of Others Explained

Difficulty: Easy Topics: Array, Sorting Platform: Leetcode Problem Statement You are...

#leetcode#java#programming#sorting

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shipra Shankhwar5d ago • 2 min read

Leetcode QOTD:- 1340. Jump Game V

How to Think About This Problem As we need to find the maximum number of indices we can...

#algorithms#dsa#leetcode#tutorial

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Leetcode QOTD:- 1752. Check if Array Is Sorted and Rotated

shipra Shankhwar6d ago • 1 min read

Leetcode QOTD:- 1752. Check if Array Is Sorted and Rotated

Traverse the array and compare every element with the next element. Use (i + 1) % nums.length so the...

#leetcode#programming#learning#computerscience

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Interview Sheet Q3:- 217. Contains Duplicate

shipra Shankhwar5d ago • 1 min read

Interview Sheet Q3:- 217. Contains Duplicate

1. Brute Force Approach Compare every element with every other element. If any pair is...

#programming#leetcode#coding

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shipra Shankhwar4d ago • 1 min read

Leetcode QOTD:- 1871. Jump Game VII

Convert the string into a char array so reachable positions can be modified directly. Start from...

#programming#leetcode#dsa#coding

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Kushal Jain5d ago • 6 min read

LeetCode Solution: 1. Two Sum

Your First LeetCode Journey: Conquering 'Two Sum' (Problem 1) with Ease! Hey fellow...

#leetcode#dsa#programming#tutorial

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Leetcode QOTD:- 3120. Count the Number of Special Characters I

shipra Shankhwar3d ago • 1 min read

Leetcode QOTD:- 3120. Count the Number of Special Characters I

Use two integers as bit masks: lower stores lowercase letters present. upper stores uppercase...

#dsa#leetcode#coding

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Vansh Aggarwal6d ago • 5 min read

LeetCode Solution: 263. Ugly Number

Demystifying Ugly Numbers: A LeetCode Adventure (Problem 263) Hey fellow coders and...

#leetcode#dsa#programming#tutorial

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MD ARIFUL HAQUE5d ago • 4 min read

1340. Jump Game V

1340. Jump Game V Difficulty: Hard Topics: Senior Staff, Array, Dynamic Programming, Sorting,...

#php#leetcode#algorithms#programming

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3121. Count the Number of Special Characters II

MD ARIFUL HAQUE2d ago • 3 min read

3121. Count the Number of Special Characters II

3121. Count the Number of Special Characters II Difficulty: Medium Topics: Senior, Hash Table,...

#php#leetcode#algorithms#programming

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MD ARIFUL HAQUEMay 22, 2026 • 3 min read

33. Search in Rotated Sorted Array

33. Search in Rotated Sorted Array Difficulty: Medium Topics: Array, Binary Search There is an...

#php#leetcode#algorithms#programming

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MD ARIFUL HAQUE1d ago • 4 min read

3093. Longest Common Suffix Queries

3093. Longest Common Suffix Queries Difficulty: Hard Topics: Senior Staff, Array, String, Trie,...

#php#leetcode#algorithms#programming

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MD ARIFUL HAQUE3d ago • 3 min read

1871. Jump Game VII

1871. Jump Game VII Difficulty: Medium Topics: Staff, String, Dynamic Programming, Sliding Window,...

#php#leetcode#algorithms#programming

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Tech Articles

Binary Tree Recursion in Interviews: The Call Stack Diagnostic

Binary Tree Interview Problems: 6 Traversal Patterns, 15 Problems

Big O Notation Explained: Derive It, Don't Memorize It

Binary Search Tree Explained: All Operations From One Rule

BFS vs DFS: The Invariant Decides, Not Your Preference

LeetCode Solution: 1. Two Sum

LeetCode Solution: 5. Longest Palindromic Substring

I Solved 512+ LeetCode Problems, and Here’s What I Learned 🧠

LeetCode Solution: 6. Zigzag Conversion

Tree Traversal: Why the Order You Pick Is a Data Flow Decision

LeetCode Solution: 1752. Check if Array Is Sorted and Rotated

LeetCode 747 in Java: Largest Number At Least Twice of Others Explained

Leetcode QOTD:- 1340. Jump Game V

Leetcode QOTD:- 1752. Check if Array Is Sorted and Rotated

Interview Sheet Q3:- 217. Contains Duplicate

Leetcode QOTD:- 1871. Jump Game VII

LeetCode Solution: 1. Two Sum

Leetcode QOTD:- 3120. Count the Number of Special Characters I

LeetCode Solution: 263. Ugly Number

1340. Jump Game V

3121. Count the Number of Special Characters II

33. Search in Rotated Sorted Array

3093. Longest Common Suffix Queries

1871. Jump Game VII