Running a lesson exercise works signed out. Marking a problem solved or saving your code asks you to sign in first.

Review, your profile, the player card and Settings still need an account, because they hold your own data.

Open the Learn map

Practice has a USACO track. It lists every problem from usaco.org’s contests since the 2015-16 season, up to the 2025-26 First, Second and Third contests: 129 in Bronze, 129 in Silver, 128 in Gold and 129 in Platinum.

Each division opens on its starred problems, oldest season first, and season filters narrow the list. A title opens the statement on usaco.org. When USACO Guide has a solution page for a problem, the row’s Details panel links to it.

Each division ends in a boss: Stuck in a Rut, Wormhole Sort, Cow Land and Cow at Large. Each division also has three mini bosses, one each from early, middle and recent seasons. Solving three quarters of a division earns its badge. You mark USACO solves yourself, and they earn XP like CSES and AtCoder problems.

Open USACO Bronze

The System design page leads with a map drawn like the DSA one. Foundations covers interview formats, how the web works, latency numbers, estimates and API design. Five branches follow: Data, Messaging and streams, Patterns, Scale and reliability, and AI systems.

Eight topics have an interactive lesson with a widget you can change: backpressure, the transactional outbox, idempotency keys, consistent hashing, caching strategies, replication and consistency, rate limiting and RAG pipelines. The other 46 topics are short reads that link the module lessons on the same idea.

Foundations topics and the Backpressure lesson are free. Branch topics come with the Complete pass.

Try the Backpressure lesson · Open the roadmap

All 41 lessons on the Learn map use this format. Each one builds the idea in short sections and walks through a worked trace before you try it yourself.

Every lesson ends with common mistakes, where the idea shows up in problems, questions to check your understanding and the runnable exercise.

After the rewrite, we opened each lesson in a browser and fixed wrong claims, broken widgets and layouts that didn’t fit on phones. Geometry with integer points is still a short read.

Try Bit manipulation · Open the Learn map

These chapters came from comparing the Learn map with the topics USACO Guide covers. Each has the full lesson format, a runnable exercise and judge practice.

• Time complexity from constraints: read the input size and time limit, then pick an approach that fits.
• Modular arithmetic and fast power: keep large counts in range and raise numbers to big powers quickly.
• Complete search: try every option when the input is small enough.
• Sorting, comparators and selection: sort by your own rule, then sweep through the result in order.
• General trees and tree DP: walk trees with any number of children and combine answers from the leaves up.

Start with Time complexity · Open General trees

A long set used to show a few rows and a Show more button that could not be closed again. Now a list of 24 problems or fewer shows whole, and a longer one opens on its starred problems.

The All problems switch in the toolbar shows every row in the same order, marks the starred ones with a small amber star, and turns off again. The count beside it reads, for example, 22 starred of 129. Badges, solved counts and the progress bar still count the whole set.

Practice pages also line up as one centred column at every width, from phones to wide monitors and zoomed-out windows.

Open CSES Graph Algorithms

Four published problem lists joined the CSES and AtCoder workspaces, each in its original order.

Every row links to an English statement on the judge and carries a one-line approach and topic. Each set ends in a boss. If you link your AtCoder handle, solves on the three AtCoder lists sync on their own; you mark CSES solves yourself.

• Boot camp for Beginners: Easy 100, 100 tasks from AtCoder Problems, listed after Beginners Selection.
• CSES Range Queries: all 25 tasks, in five steps.
• AtCoder Library Practice Contest: 12 tasks.
• AAL Contest 001: Let’s use segtree!, AtCoder’s 24-task segment tree contest from October 12, 2026.

Open Let’s use segtree! · Open CSES Range Queries

This update adds NVIDIA, Robinhood and Rubrik, 21 India employers such as Swiggy, Zomato, Paytm and Zoho, and 26 US and global employers such as Apple, Netflix, Airbnb and LinkedIn.

Each guide follows the same layout: the interview format the company publishes, with its source, dated candidate reports where they exist, and practice that fits the format. The practice picks are Arise’s own.

Each card on the Companies page uses paper in the company’s own colour, and 17 cards that showed the name as plain text now carry the company’s real logo.

Browse companies

Below the shared trunk, the four branches (Arrays and searching, Trees and recursion, Graphs, and Dynamic programming) are drawn as small maps. Chapters hang from one spine down the middle and branch left and right in teaching order.

A star marks a key topic for your goal. Fog covers advanced chapters and clears once you complete the chapters leading into them, or when you click it. Arise remembers cleared fog on your device.

Open the Learn map

The LeetCode Premium list holds LeetCode’s 536 subscriber-only algorithm problems: 61 Easy, 339 Medium and 136 Hard. Each one sits in one of the 27 LeetCode chapters by its topic, and each chapter lists them from Easy to Hard.

A title opens a window that links to the problem on LeetCode, where you read it with your own LeetCode Premium subscription. Mark solves by hand or sync them from your LeetCode handle; they earn the usual LeetCode XP.

Premium problems stay out of chapter totals and badges, so a free learner’s goals never include problems they cannot open.

See the Premium list

The home page and Pricing end on the full coast. Every other page shows a thin strip of it below the links, from the lantern to the horizon.

The lantern glows in the Arise violet and slowly brightens and dims. With reduced motion on, it stays still.

See it on the home page

A chapter opens on two tabs. Lesson holds the explanation and the exercise; Practice lists the chapter’s judge problems.

At 1200 pixels and wider, a column on the right lists the lesson’s sections and how many core problems you have solved, with extra problems on their own row. Narrower screens get an On this page list under the tabs.

The chapter sidebar sits against the edge of the window and groups chapters the way the map does. Its search ranks chapter names first and opens the best match when you press Enter.

Open the Arrays lesson · Open Arrays practice

Switch the Learn map between Coding interviews and Programming contests. Interview mode shows the core chapters in teaching order.

Contest mode starts with selected CSES and AtCoder exercises and adds the advanced chapters to their branches. It places CSES and AtCoder sets beside the matching chapters and ends on a path to the Codeforces bands from 1200. Chapters that only interviews need are dimmed and don’t count toward the totals.

Both views share your solves and saved code.

See the contest path

Every problem in the LeetCode, Codeforces, CSES, AtCoder and Awakening sets has a hint ladder written for it, with more hints for harder problems. Open the next hint only when you are stuck again.

Problems from Japanese-only and members-only sources were replaced with English problems at the same time.

Try a hint in LeetCode Arrays

The last problem of a set is its boss, shown in its own row with its own character. Mini bosses carry amber crossed swords: two in each Codeforces band, closing its first and second thirds, one in each LeetCode chapter, and one in each CSES or AtCoder collection of 15 problems or more.

Codeforces band pages use shades of blue, keep the official rating colours on each problem, and show the band’s boss as a figure above the set header.

Open Codeforces 1500

The sidebar lists the judge’s sets with your solved counts, and becomes a slide-out panel on phones. The set header gives the name, one line of detail, a progress bar and the boss. Topics, filters and handle linking sit in a toolbar above the list.

Each judge keeps its own look: rating badges for Codeforces, warm paper for CSES and light paper for AtCoder. Every set has its own character, with its head showing above the card.

Open AtCoder · Open CSES

Review brings back problems you solved so you rebuild the approach before you forget it. The page starts with what is due today, then a forecast of the next 14 days.

Each card asks you to recall the approach before you see your notes and hints. Grade the attempt Nothing, Something, Hard, Okay or Easy. Nothing and Something bring the problem back tomorrow; Hard grows the gap slowly, and Okay and Easy grow it further.

Review is free. It needs an account, because it keeps your own history, and new accounts start with it on.

Open Review

Both boards rank only members who choose to join. Arise works out All time XP from your solves, and This week ranks the current week.

The top three stand on a podium with their avatar, level and grade seal. Join, rename yourself or leave from the board or in Settings > Account.

Open Leaderboards

The 15 multi-language interview templates now include Rust beside Python, C++, Java and Go. Nine more interview templates come in Python, C++ and Rust.

Six contest starter files are free to read and download: C++ for single and multiple test cases, AtCoder and LeetCode, plus Python and Rust.

The template library filters by search, use, access, language and topic. The filters stay in the address bar, so Back keeps them.

Browse templates

Chapter links on the Learn map open the lesson directly.

A searchable chapter list sits beside the lesson, and each lesson ends with the next chapter in map order. The map itself became a skill tree: a shared trunk of basics, then four branches.

Bridges, Euler tours and binary lifting got lessons of their own.

Open the Learn map · Open Binary lifting

Lesson exercises run in Python or C++. Choose C++ in the exercise, or set it as your code language in Settings so exercises open in it.

C++ runs need an account. The standard headers are hidden, so the exercise shows only your code.

The editor has settings for Vim keys, font size and line wrap.

Try the Arrays exercise

A sprint is a 4 or 8 week plan built from your goal, the time you have each day and your saved practice. Days mix lessons, judge problems and review. Assessment sprints add timed rehearsals, and behavioral sprints have you write and rehearse STAR answers.

The sample week is free: seven days of lessons, judge problems, review and a 25-minute rehearsal. The full planner comes with a Practice or Complete pass.

Open the sample week · Read about sprints

Lessons live under Learn. Each one explains why the idea works, traces it on a small input and ends with an exercise you write and run on the page.

Exercise runs stay separate from your solve counts and grades. The first exercise you pass earns a one-time 10 XP bonus.

Open the Learn map

A problem statement opens only when you click its title, in a window that keeps its size while it loads. Math shows as proper formulas, and the window links to the original problem on its judge.

Codeforces doesn’t let Arise load its statements, so Codeforces rows open the same window with the problem’s rating and an Open on Codeforces link.

Try it on CSES

Assessments shows your grade and your next timed test. Each test has two problems and a time limit between 60 and 90 minutes.

You unlock a test by solving its qualifying problems on either route: LeetCode, or CSES and AtCoder.

Each grade family has its own material and seal, from graphite through green, blue, violet, orange and gold to deep red SS.

Open Assessments

Sign up with email or Google. Setup asks about your experience, goal, main track and daily pace, and Arise recommends a first chapter from your answers.

Your profile leads with a player card: your level, XP to the next level, your grade and up to three medals. Download it as a PNG to share.

Eighteen medals each state their requirement, from solve milestones to 30- and 100-day streaks.

Create an account

Videos has three short lessons, each taught by a different guide in a different setting. Captions follow the narration, and the full transcript sits beside the video.

Watch the lessons

Each candidate report shows its source and date. India pages cover campus tracks where the company publishes them.

Arise picks a region from your country, so you see India or US preparation first.

Browse companies