Contest
LeetCode Weekly / Biweekly
200+ real contests with long-term consistency under pressure.
Algorithm Coach / Contest Mentor / Builder
Turning algorithm training into a journey you can feel
I am Coco, founder of cocode, an active LeetCode contestant, and a mentor who keeps helping students prepare for algorithms, recruiting, and interviews.
This is the first version of a scroll-driven intro page. As you move down, you will see proof of results, how I teach, what I focus on, and why I keep doing this work.
Long-term contest practice
Algorithm coaching
OA and recruiting prep
Explanation-first training
Coco
Founder of cocode / Algorithm contest and recruiting coach
- Biweekly Contest champion (Rank #1 in Contest 161)
- Multiple Top 10 finishes in LeetCode contests
- Long-term mentoring for algorithms and campus recruiting prep
200+
LeetCode contests joined
10+
Representative Top 10 finishes
1x champion
Biweekly first place
Scroll to continue
Teaching
Explaining and drilling
From fundamentals to DP, graphs, and problem-solving patterns.
Recruiting
Campus recruiting prep
Helping students connect algorithm skill with actual interview outcomes.
Personal Homepage
Think of this as my personal homepage
It is not meant to be a resume summary. It is closer to a personal homepage that explains the kind of value I want to offer over time: clearer training, calmer guidance, and a more structured growth path.
- Turn algorithm practice into a reusable problem-solving framework.
- Break timed contest and OA performance into trainable actions.
- Keep communication, coding, and review in one connected loop.
LeetCode contests joined
200+
Representative Top 10 finishes
10+
Biweekly first place
1x champion
Core coaching themes
4 focus areas
From here, these are the three main entry points
If this page works as a homepage, these cards should feel like the clearest next steps: read the blog, browse the bank, or jump straight into the coaching layer.
Blog
Blog
Longer-form writing on algorithms, contests, recruiting, and practical review habits.
12+
Long-form pieces and structured notes
Notes
Recruiting
Review
Bank
Problem Bank
A cleaner way to move through curated problem sets, grouped resources, and training paths.
Grid
A training surface built around progression
Tracks
Sets
Practice
Coaching
Coaching
If you care more about guidance than content, jump directly to the coaching section.
1:1
Closer to a roadmap than a one-off answer
Plan
Speed
Review
Start with visible proof
I wanted this page to feel evidence-based rather than self-promotional, so the first stop after the hero is a compact proof section.
200+
LeetCode contests joined
Sustained practice in real contest settings over a long period.
10+
Representative Top 10 finishes
Not a one-time peak, but repeated strong results.
1x champion
Biweekly first place
Ranked 1st in Biweekly Contest 161.
4 focus areas
Core coaching themes
Foundations, contest speed, OA prep, and interview delivery.
A few contest results you can verify
These are some of the most representative results, with links so the page can stay grounded in something checkable.
How I can help
If you are learning algorithms, preparing for OAs, or practicing hard without a clear system, these are the kinds of support that fit best.
Why this work fits me well · My own path looks a lot like the path many students are walking now, which is why I care so much about turning vague improvement into concrete action.
Support
Structured algorithm roadmap
Reorganize topics such as data structures, DP, graphs, and tricky thinking problems into a cleaner progression.
Support
OA and timed coding practice
Train problem selection, implementation speed, edge-case checking, and debugging rhythm under time pressure.
Support
Interview communication and coding drills
Practice clarifying questions, explaining complexity, validating with examples, and writing code with confidence.
Support
Longer-term coaching and review
Connect practice sessions into a visible improvement loop instead of letting them stay isolated.
Journey
Built on long-term real practice
A large contest volume teaches pacing, decision-making, and where strong students actually lose points.
Journey
Focused on clarity, not just answers
I prefer breaking down transitions, boundary cases, patterns, and decision points instead of only presenting the final idea.
Journey
Aiming for stable output, not random peaks
Many students are capable already. The real challenge is turning that ability into reliable performance under time pressure.
Mentors
Mentor Introduction
This page gives a quick overview of teaching style, focus areas, and representative experience.
The two mentor profiles below are fictional demo personas created for page design and structure preview.
L
Lin Chuan
Algorithm Contest Coach / Bootcamp Instructor (Demo)
Turns difficult problems into repeatable actions you can execute under pressure.
Lin focuses on layered algorithm training and helps students convert knowledge into stable performance workflows.
Badges
ACM Provincial Gold (Demo)
Lead Bootcamp Instructor (Demo)
OA Sprint Mentor (Demo)
Experience
- Built 200+ hours of staged training syllabus (Demo)
- Led multiple timed-coding acceleration cohorts (Demo)
- Strong at unblocking 'I know it but I write too slow' cases (Demo)
Focus Areas
DP / Graph
Timed coding speed
Review system
Z
Zhou Lan
Interview Communication Coach / Algorithm Mentor (Demo)
Upgrades coding ability into clear communication and interview-ready delivery.
Zhou specializes in verbal reasoning, explanation flow, and turning raw solving ability into interview outcomes.
Badges
Interview Coaching Mentor (Demo)
Algorithm Explanation Instructor (Demo)
Communication Trainer (Demo)
Experience
- Runs long-term mock interview and delivery training (Demo)
- Built reusable speaking templates from code to explanation (Demo)
- Emphasizes rhythm, structure, and feedback loops (Demo)
Focus Areas
Whiteboard communication
Complexity explanation
Structured retrospectives
Full introduction
This final section keeps the longer-form written version for readers who want the complete background.
You Are Not Alone on Your Algorithm Learning Journey
Hello everyone, my name is Coco, founder of cocode. I am a passionate learner of algorithms and programming contests 📘💻, and I truly enjoy sharing my experience with others. I have been an active participant on LeetCode China (leetcode.cn) for many years, where I have competed in over two hundred Weekly and Biweekly Contests. I have consistently achieved Top 10 rankings 🏅, representing genuine individual problem-solving ability - unaffected by AI tools or automation. Here are some representative results:
- Ranked 7th in Biweekly Contest 165
- Ranked 3rd 🥉 in Biweekly Contest 163
- Ranked 1st 🥇 in Biweekly Contest 161
- Ranked 6th in Biweekly Contest 159
- Ranked 10th in Weekly Contest 454
- Ranked 2nd 🥈 in Biweekly Contest 157
- Ranked 6th in Weekly Contest 446
- Ranked 8th in Weekly Contest 441
- Ranked 5th in Biweekly Contest 152
- Ranked 7th in Biweekly Contest 150
During my time at university 🎓, I often explained algorithm concepts to my classmates - from fundamental data structures to advanced topics such as dynamic programming and graph theory - supported by real problem examples. This experience showed me that sharing knowledge and growing together is truly meaningful 🤝.
These contest results and teaching experiences have equipped me with not only strong algorithmic skills ⚙️ but also the ability to explain complex problems clearly ✨. In the future, I hope to pass on the joy of algorithmic thinking to more students, helping them enhance their problem-solving skills and find their own sense of accomplishment 🚀.
Currently, I am also dedicated to guiding students in their campus recruitment preparation 🍂💼. For students in North America, this includes targeted practice for OAs (Online Assessments) and VOs (Virtual Onsite interviews), covering common algorithm patterns, implementation speed, and interview-style problem-solving strategies. Through teaching and mentorship, I aim to help more students walk confidently and steadily on their journey toward algorithms and career opportunities 🌟.
👉 If you are interested in algorithms, or if you are preparing for OA/VO or campus recruitment, feel free to reach out. Let's explore and grow together in the world of algorithms, and embrace new challenges and opportunities 💪🌍.
If you are on this path too
The feeling I want this page to leave behind is not just that I have strong results, but that this journey gets easier when someone helps you move through it with structure and calm.
If you want a more structured path for algorithms and recruiting
Think of this page as the visual entry point: get a feel for the style here, then move into the blog, problem resources, and the rest of the ecosystem.
Long-term contest practice
Algorithm coaching
OA and recruiting prep
Still growing, still shipping
Continue from here
Open the blog, review the notes, or jump back to the beginning for another pass.
200+
LeetCode contests joined
10+
Representative Top 10 finishes