Each week, you'll solve problems in a personal private repository and submit your solutions via a GitHub PR. Your submissions will undergo format checks and receive AI reviews for each problem. By the end of the 5 weeks, you'll walk away with "10 fully explainable solution records" that you can use as-is in real coding tests.
✋ However, absolute beginners aren't eligible just yet. You must pass the entrance exam (pre-assessment) to even step up to the starting line.
Created by DingcoDingco, with 18,000+ total students on Inflearn, an average satisfaction rating of 4.9, and a track record of passing interviews at 38 companies.
You don't need to copy and submit the GitHub URL. The Dingco website seamlessly handles everything from setting up your personal repository and creating the mission branch and PR to checking your reviews.
The screen above is an example based on the actual operational UI and repository and channel rules. Repository names and review scores vary by participant.
Two days after we start, we'll first walk you through on screen how the 5-week program runs. All you have to do is follow the exact path to your first submission.
The participation link will be shared via a Discord announcement before the start.
This challenge does not offer lectures or textbooks. Instead, it integrates weekly practical problems, personal private repositories, GitHub PR submissions, submission format validation, per-problem AI reviews, and peer comparisons into a single seamless workflow to keep you on track until the very end.
What the challenge provides is 10 practical problems, a submission environment, and a feedback loop that drives you all the way to the finish line.
The linked course, "Secrets to Passing 38 Companies, Essential Algorithms for the 2026 Coding Test," is a separate purchase option for those who wish to further reinforce their understanding of the concepts. It is not included in the challenge, nor is it mandatory to take.
We will send a 30% discount coupon for this course to everyone who simply signs up, via email and announcements.
After applying on Inflearn, access the participation link in the News. Once you log in with Kakao, your membership will be created immediately, and after completing the pre-assessment, connect GitHub first, and then connect Discord last.
It's an easy 6-question multiple-choice test to assess your basic algorithmic intuition. You'll pass if you answer at least 4 out of the 6 questions correctly.
Even if you don't pass, you can retake the assessment. If you feel your foundation is lacking, you can purchase the linked course separately using the 30% coupon provided to all applicants to brush up on the basics and try again. However, once the diagnostic period ends, boarding for this cohort is closed.
There are no hidden problems. Take a look now and decide for yourself.
Program Period 2026-08-03 ~ 09-06 · Final Retrospective 2026-09-09 · Choose your language from Python, Java, or JavaScript.
DingCoding. Built on the experience of passing coding tests at 38 companies, this program guides you to completion by combining a sequence of real-world practice problems with deadlines, managed GitHub PRs, automated reviews, and peer comparisons. Rather than a course that teaches new concepts through lectures, it is a program designed to push you to submit your solutions using what you've already learned, all the way to the finish line.
※ These metrics are based on the public Inflearn profile and DingCoding's public materials as of 2026-07-24 and are subject to change. They do not represent the completion rate or employment outcomes of this 5-week challenge, nor do they guarantee employment.
You can simply choose the depth you need right now. The content of this challenge is not combined with the 10-week bootcamp.
No, this challenge does not include lectures or textbooks. Instead, it provides weekly hands-on problems, a personal private repository, a GitHub PR submission environment, submission format validation, per-problem AI reviews, and peer comparisons.
Assess your foundational algorithm skills with 6 easy multiple-choice questions. Answer at least 4 out of the 6 questions correctly to pass and unlock the GitHub connection step. For any weak areas, you can purchase related lectures separately or supplement your knowledge with familiar materials before retaking the test.
No. The Dingo website provides buttons to set up your personal repository, create mission branches, and open pull requests. Participants simply need to write their solutions and explanations locally and push them to the corresponding branch. There is no submission method that requires pasting a PR URL or entering code directly on the website.
You can find detailed reviews on the Dingo Challenge page and in the GitHub PR comments. Scores and key feedback are also briefly shared in the public Discord channel for Algorithm Challenge Cohort 1. Security-sensitive changes or low-confidence assessments are not automatically merged and will instead be reviewed by an admin.
After passing the pre-assessment, first prepare your GitHub account and personal repository, and then link them at the final step. Once linked, you will be assigned the Algorithm Challenge Cohort 1 role and granted access to the announcements, weekly discussion, Q&A, and lounge channels.
No. The connected course is simply a separate, optional product for pre-learning; it is neither a prerequisite for joining the challenge nor an included package. If you feel you need to strengthen your understanding of the concepts during the program, you can do so using the 30% discount coupon provided to applicants.
Write your solution code in the submit/<mission> branch of your personal private repository, and submit it via a GitHub PR, documenting your problem analysis, rationale for your choices, time and space complexity, and revision process in evidence/<mission>.md. Checks for the branch, solution files, and evidence format, as well as the AI review for each problem, will remain in the same PR. For external problems, the passing result from Programmers must also be recorded in the evidence.
You may use a 48-hour extension only once throughout the entire course. To successfully complete the course, you must submit at least 8 out of 10 problems, peer reviews for at least 4 out of 5 weeks, and reflections for at least 4 out of 5 weeks.
No. This course is a free 5-week challenge where you complete practical algorithm problems through submissions and feedback. The 10-week bootcamp is a separate program that covers project feedback and job preparation in greater depth.
