Every week, you will create solutions in your private repository and submit them via GitHub PRs. After undergoing submission format checks and AI reviews for each problem, you will emerge in five weeks with "10 explainable solution records" that you can use directly in actual coding tests.
✋ However, this is not for absolute beginners yet. You must pass the entrance exam (pre-diagnosis) to stand at the starting line.
Created by Dingco Dingco, who has over 18,000+ cumulative students on Inflearn, an average satisfaction rating of 4.9, and experience passing interviews at 38 companies.
모집·참여 확인
Do not copy and submit the GitHub address. The Dingco website handles everything from preparing your private repository and creating mission branches and PRs to checking reviews.
The screen above is an example created based on the actual operation UI and repository/channel rules. The repository name and review scores will vary for each participant.
On the first Monday evening, we will show you on-screen how the 5-week process operates. Prepare the problems and branches in advance, and simply follow the actual workflow—from setting up the crew channel to the submission button that appears afterward.
The participation link will be provided via Discord announcement before the start.
Starting from Week 2, leave a short comment on the PR, and crews will share only the points where they got stuck and alternative approaches.
Team Bonus Activity
Participants do not write separate posts other than a brief comment on the mission. The Crew +5 bonus is separate from individual completion.
This challenge does not provide lectures or textbooks. Instead, it bundles weekly practical problems, individual private repositories, GitHub PR submissions, submission format checks, AI reviews for each problem, and peer reviews into a single workflow to ensure you execute until the end.
What the challenge provides is 10 practical problems, a submission environment, and a feedback loop that pushes you through to the end.
The related lecture, "Secrets to Passing 38 Companies: Essential Algorithms for the 2026 Coding Test," is a separate purchase option for those who wish to further supplement their conceptual understanding. It is not included in the challenge, and taking it is not mandatory.
Just by applying, everyone will receive a 30% discount coupon for this lecture via email and announcement.
Regardless of whether you have applied on Inflearn, check the current cohort using the Check Recruitment/Participation button above. Once you log in via Kakao on Dingco, your spot will be secured. After completing the preliminary diagnostic, connect GitHub first, then finally connect Discord.
Crew operations are disclosed as follows.
Crews are typically organized with 5 to 6 members, and the roster remains hidden until disclosure. Registration and pre-diagnosis close at 19:00 on Wednesday of the starting week, and the crew list and dedicated Discord channel are revealed at 20:00 on the same day. Week 1 problems, personal repositories, and mission branches can be prepared in advance, and the PR submission button will be automatically activated once your crew channel setup is complete. Questions and progress are shared within the crew Discord; however, official reviews and scores are primarily based on passing PRs within your own crew. If no targets are available, PRs from other crews in the same cohort are opened to tentatively aggregate one cumulative review per week. Detailed scorecards are not disclosed, and only winning crews who have provided consent will be introduced in the Hall of Fame with GitHub badges and public names after the final scores are confirmed.
These are 6 easy multiple-choice questions to check your basic algorithm sense. You pass if you get at least 4 out of 6 questions correct.
Even if you fail, you can retake the test. If you feel you lack the basics, you can supplement your learning by separately purchasing the related course using the 30% coupon provided to all applicants and then try again. However, once the diagnostic period ends, enrollment for this cohort will close.
There are no hidden problems. Look and judge for yourself now.
Operation Aug 5, 2026 – Sep 8, 2026 · Cumulative Review Deadline Sep 13, 2026 · Choose from Python, Java, JavaScript, or C++.
Dingco Dingco. This is a program designed to ensure completion by combining a practical problem sequence—created based on the experience of passing coding tests at 38 companies—with deadlines, managed GitHub PRs, automated reviews, and peer comparisons. Rather than a course that delivers new concepts through lectures, it is a process focused on making you submit and finish what you have already learned.
※ The above metrics are based on Inflearn public profiles and Dingco Dingco public materials as of 2026-07-24 and are subject to continuous change. They do not represent the completion rate or employment outcomes of this 5-week challenge, nor do they guarantee employment.
You can choose the depth you need right now. The contents of the 10-week bootcamp are not included in this challenge.
No. This challenge does not provide lectures or textbooks. Instead, it provides weekly practical problems, individual private repositories, a GitHub PR submission environment, submission format checks, AI reviews for each problem, and peer comparisons.
We check your basic algorithm intuition with 6 easy multiple-choice questions. If you answer 4 or more correctly, you pass, and the GitHub connection step will be unlocked. If you fall short, you can supplement your knowledge through separate lecture purchases or your own study materials before retaking the test.
No. The Dingco website connects the preparation of personal repositories, mission branches, and PR creation through buttons. Participants simply need to write their solutions and explanations locally and push them to the corresponding branch. There is no submission method that involves pasting a PR address or entering code directly on the website.
Detailed reviews can be found on the Dingco Challenge page and in the GitHub PR comments. Discord is a space for reading materials, questions, free conversation, and weekly operational announcements; personal review cards are not posted there. Changes involving security sensitivities or low-confidence judgments will not be merged automatically and will be reviewed by an administrator.
After passing the pre-diagnostic test, prepare your GitHub account and personal repository first, then connect them at the end. Once connected, you will be assigned the Algorithm Challenge 1st Class role and granted access to the announcement, reading materials, questions, and free channels. You will also be able to share questions and progress with other participants on the Crew Discord.
No. The linked lectures are simply a separate optional pre-learning product; they are neither a requirement for participating in the challenge nor an included product. If you feel you lack certain concepts during the process, you can supplement your learning using the 30% discount coupon provided to applicants.
Write the solution code in the submit/<mission> branch of your private repository, record the problem analysis, rationale for choices, time/space complexity, and modification process in evidence/<mission>.md, and submit it via a GitHub PR. Checks for branch, solution file, and evidence format, along with AI reviews for each problem, will be left on the same PR. For external problems, the Programmers pass results must also be recorded in the evidence.
Crews are usually operated with 5 to 6 members, and the lists are kept hidden until they are released. Registration and the preliminary diagnosis close at 19:00 on the Wednesday of the starting week, and the crew lists and dedicated Discord channels are released at 20:00 on the same day. Week 1 problems, individual repositories, and mission branches can be prepared in advance, and the PR submission button will be automatically activated at 21:00 on the same day. Official reviews and scores are primarily based on the passed PRs of one's own crew; if there are no eligible targets, PRs from other crews in the same cohort are opened to tentatively aggregate one case per week cumulatively. Detailed scoreboards are not disclosed. Once the final scores are confirmed after the end, only the winning crews who have consented will be introduced in the Hall of Fame with GitHub badges and public names.
No. This course is a free challenge where you complete real-world algorithm problems through submissions and feedback over 5 weeks. The 10-week bootcamp is a separate program that covers project feedback and job preparation in greater depth.
Highly recommended challenge for improving your algorithm skills—Dingorithm, as expected.
