• Add more languages to Basic Data Structures by Language

• Added quizzes for Foundation course lessons
• Added video walkthrough for Heap Intro

• Updated sections on runtime: Runtime to Algo, Understanding speed
• Added a new line sweep problem
• Option to hide pattern and difficulty in Practice

New content!

Intervals

• Meeting Rooms II https://algo.monster/problems/meeting_rooms_ii
• Non-overlapping Intervals https://algo.monster/problems/non_overlapping_intervals
• Minimum Number of Arrows to Burst Balloons https://algo.monster/problems/minimum_number_of_arrows_to_burst_balloons
• Partition Labels https://algo.monster/problems/partition_labels

Stacks

• Min Stack https://algo.monster/problems/min_stack
• Basic Calculator https://algo.monster/problems/basic_calculator
• Largest Rectangle in Histogram https://algo.monster/problems/largest_rectangle_in_histogram

Graph

• Clone Graph https://algo.monster/problems/clone_graph
• Pacific Atlantic Water Flow https://algo.monster/problems/pacific_atlantic_water_flow

Trie

• Add and Search Words Data Structure https://algo.monster/problems/design_add_and_search_words_data_structure
• Word Search II https://algo.monster/problems/word_search_ii

Fixes

• Add "Theatre/Wide Mode" to code editor (thank you Eric)
• Update Doubly Linked List
• Updated Segment Tree
• Updated Advanced Sorting

• Added Prefix Sum Intro
• Update DFS on Tree
• Misc updates

• Font and theme customization, focus mode

• Bug fixes

• Added a setting to enable or disable Autocomplete in the Code Editor.

• Fix LLD notification badge dismissal;
• Add code editor for editorials.

🔥 New course: Low-Level Design (LLD / OOD) interviews . Learn object-oriented design for interviews end to end — a six-step delivery framework, OOP foundations, the SOLID principles, the common design patterns, and concurrency.

• 15 case-study walkthroughs — parking lot, elevator, ATM, vending machine, logging framework, Splitwise, in-memory file system, hotel booking, rate limiter, in-memory key-value store, chess, and more — each with a runnable solution in multiple languages, decision checkpoints, and a run-and-test trace.
• Practice problems out loud with the AI mock interviewer, graded on a real rubric.

• Content updates and bug fixes

New — Your Roadmap (/path): a personalized, step-by-step study plan. Take a quick placement quiz, pick your target companies, and get one ordered path with a clear next step, company-tagged practice problems, Tested Out skipping for topics you already know, and a finish-date estimate you control by setting lessons per week.

• Added more visualizations to the Foundation Course.

• Add algorithm visualization for more articles.

• Improved AI-Enabled Interview Questions

• Updated parts of the Algorithm Visualization content to improve clarity and understanding.
• Optimized the experience on smaller screens for better usability and responsiveness.

• Updated flowchart
• Update teaching assistant

• Added AI-enabled interview problems for realistic mock interview practice
• Improved the Practice page with content and layout updates for a better browsing experience

• Added chat history
• Improved article content
• Enhanced Algorithm Visualization

• Added more AI-enabled interview questions.
• Introduced Algorithm Visualization to the Foundation course.

• New course: Low-Level Design (LLD / OOD) interviews. Learn object-oriented design for interviews end to end — a six-step delivery framework, OOP foundations, the SOLID principles, the common design patterns, and concurrency.
• 15 case-study walkthroughs — parking lot, elevator, ATM, vending machine, logging framework, Splitwise, in-memory file system, hotel booking, rate limiter, in-memory key-value store, chess, and more — each with a runnable solution in multiple languages, decision checkpoints, and a run-and-test trace.
• Practice each case study out loud with the AI mock interviewer, graded on a real rubric.

• Bug fixes

• Bug fixes and UI updates

• Use the '?' button at the bottom right corner to ask questions and share feedback.

• Add more practice problems to DFS on Tree section

• Updated ROI chart

• UX improvements

• Addiontal practice questions for Prefix Sum.
• Highlight any article content to use as context to chat with AI.
• Command + enter to enter a new line in chat with AI.

• Resolved the compilation issue in Golang.

• Minor UX updates

• Added ruby and rust support

• Added more company interview guides

• update stack and queue intro articles

• Fix go compiler timeout

• Company Interview Guides

• System Design: Uber

• Select text and ask Monster AI for an explanation.

• UI revamp

• Content revamp

• Add Go solutions to BDS and backtracking.

• Added Go solutions to binary search and BFS.