A comprehensive collection of code solutions for LeetCode and Codeforces problems, designed to enhance your competitive programming skills and help you tackle coding challenges with confidence.

Master stack data structure — Monotonic stack, NGE, stock span, expression evaluation, min-stack. 30+ interview problems with O(n) solutions.

Typescript implementation of monotonic stack.

Some Important Data Structure and Algorithm Questions while preparing for Interviews. These questions are very important and most popular one so you should revise them when appearing for interviews

Collection of LeetCode solutions in Java covering Data Structures, Algorithms, Dynamic Programming, Trees, Graphs, Binary Search, and Interview Preparation

Competitive programming problem designed to expose failure modes in frontier LLMs. Features a 3-layer trap invalidating greedy, O(N²) DP, and prefix-sum optimizations. Correct O(N log V) solution via monotonic stack + DP. Built for Turing's Python TopCoder Problemsetter Assessment.

A slim and efficient in-memory Deque (doubly-ended queue) for Node.js projects, designed with Data-Oriented Design principles and implemented using a cyclic buffer to optimize memory layout through sequential item allocation. A notable real-world use case is maintaining the minimum or maximum item in a data stream.

Implementation of Data Structures and Algorithms in C++. I also upload my leetcode solutions here.

Are you in love with PHP? So do I! I enjoy solving problems and implementing data structures and algorithms in PHP.

Repo contain organized solutions to LeetCode problems in languages like Python or C++. It’s a useful resource for learning algorithms, coding practice, and interview preparation.

Solutions to Leetcode questions

Monotonic Stack Visualiser

Monotonic Stack Visualiser

Optimized Java implementations of fundamental algorithms with a focus on Big O complexity and performance analysis.