Hi everyone!↵
↵
Over the past few months I've been building **CP-Vertex**, a training platform designed around one simple idea:↵
↵
> Most tools can tell you **what your weaknesses are**. Very few tell you **what to practice next.**↵
↵
The goal of CP-Vertex is to bridge that gap.↵
↵
Website:↵
https://cpvertex.vercel.app/↵
↵
Source Code:↵
https://github.com/aristoncodes/CP-Vertex↵
↵
---↵
↵
## The Training Loop↵
↵
Instead of randomly picking problems, CP-Vertex follows a simple workflow:↵
↵
> **Analyze your profile → Identify weak topics → Practice them → Test yourself in a duel → Upsolve missed problems → Repeat**↵
↵
The focus is on helping you improve the topics that actually limit your progress.↵
↵
---↵
↵
## 1v1 Duels↵
↵
Challenge another programmer to a live duel.↵
↵
Problems are automatically selected around both players' ratings, making matches competitive rather than one-sided.↵
↵
Features:↵
↵
* Automatic problem selection↵
* Live progress updates↵
* Spectator mode↵
* Server-side duel validation↵
* Solve verification through the Codeforces API↵
↵
There is no "Mark as Solved" button—you must actually solve the problem on Codeforces.↵
↵
↵
---↵
↵
## Drill — Targeted Practice↵
↵
This is the feature I care about the most.↵
↵
The system analyzes your solved problems and recent contests to identify your weakest topics, then generates a practice set specifically for those topics.↵
↵
If Graphs are your weakest area, you'll receive Graph problems.↵
↵
If DP is holding you back, you'll practice DP.↵
↵
The goal is to eliminate the question:↵
↵
> *"What should I solve next?"*↵
↵
↵
---↵
↵
## Other Training Modes↵
↵
* **Blitz** — Short timed sessions for improving speed.↵
* **Warmup** — A few at-level problems before a contest.↵
* **Boss** — One problem roughly 300–500 rating above your current level.↵
* **Upsolve Tracker** — Automatically queues unsolved contest problems so they don't get forgotten.↵
* **Virtual Contests**↵
* **Problem Browser** with rating, tag and solved-status filters.↵
↵
---↵
↵
## Analytics↵
↵
You can analyze any public Codeforces handle without creating an account.↵
↵
Available features:↵
↵
* Topic strengths and weaknesses↵
* Rating heatmap↵
* Contest pace and accuracy↵
* "What if I had zero wrong submissions?" estimate↵
* Handle comparison↵
↵
```↵
/u/<handle>↵
↵
/u/<your_handle>/vs/<another_handle>↵
```↵
↵
Unlike most analyzers, these insights feed directly into Drill recommendations and the Upsolve Tracker.↵
↵
↵
---↵
↵
## Technical Details↵
↵
A few implementation details that people here may be interested in:↵
↵
* Uses official Codeforces problem ratings.↵
* Counts only distinct solved problems.↵
* Team submissions are excluded.↵
* Multiple accepted submissions do not inflate statistics.↵
* Handle ownership is verified using a Compilation Error submission (no passwords or account access).↵
↵
The project is completely open source.↵
↵
---↵
↵
## Current Limitations↵
↵
* Statistics depend on Codeforces data synchronization.↵
* Duels require two users online at the same time.↵
↵
---↵
↵
## Feedback↵
↵
I'd really appreciate feedback from the Codeforces community, especially on the **Drill** recommendations.↵
↵
If the generated practice sets don't match your actual weaknesses, or if you have ideas for improving the training workflow, I'd love to hear them.↵
↵
Thank you for reading!↵
↵
— **joyboy24**↵
↵
Over the past few months I've been building **CP-Vertex**, a training platform designed around one simple idea:↵
↵
> Most tools can tell you **what your weaknesses are**. Very few tell you **what to practice next.**↵
↵
The goal of CP-Vertex is to bridge that gap.↵
↵
Website:↵
https://cpvertex.vercel.app/↵
↵
Source Code:↵
https://github.com/aristoncodes/CP-Vertex↵
↵
---↵
↵
## The Training Loop↵
↵
Instead of randomly picking problems, CP-Vertex follows a simple workflow:↵
↵
> **Analyze your profile → Identify weak topics → Practice them → Test yourself in a duel → Upsolve missed problems → Repeat**↵
↵
The focus is on helping you improve the topics that actually limit your progress.↵
↵
---↵
↵
## 1v1 Duels↵
↵
Challenge another programmer to a live duel.↵
↵
Problems are automatically selected around both players' ratings, making matches competitive rather than one-sided.↵
↵
Features:↵
↵
* Automatic problem selection↵
* Live progress updates↵
* Spectator mode↵
* Server-side duel validation↵
* Solve verification through the Codeforces API↵
↵
There is no "Mark as Solved" button—you must actually solve the problem on Codeforces.↵
↵
↵
---↵
↵
## Drill — Targeted Practice↵
↵
This is the feature I care about the most.↵
↵
The system analyzes your solved problems and recent contests to identify your weakest topics, then generates a practice set specifically for those topics.↵
↵
If Graphs are your weakest area, you'll receive Graph problems.↵
↵
If DP is holding you back, you'll practice DP.↵
↵
The goal is to eliminate the question:↵
↵
> *"What should I solve next?"*↵
↵
↵
---↵
↵
## Other Training Modes↵
↵
* **Blitz** — Short timed sessions for improving speed.↵
* **Warmup** — A few at-level problems before a contest.↵
* **Boss** — One problem roughly 300–500 rating above your current level.↵
* **Upsolve Tracker** — Automatically queues unsolved contest problems so they don't get forgotten.↵
* **Virtual Contests**↵
* **Problem Browser** with rating, tag and solved-status filters.↵
↵
---↵
↵
## Analytics↵
↵
You can analyze any public Codeforces handle without creating an account.↵
↵
Available features:↵
↵
* Topic strengths and weaknesses↵
* Rating heatmap↵
* Contest pace and accuracy↵
* "What if I had zero wrong submissions?" estimate↵
* Handle comparison↵
↵
```↵
/u/<handle>↵
↵
/u/<your_handle>/vs/<another_handle>↵
```↵
↵
Unlike most analyzers, these insights feed directly into Drill recommendations and the Upsolve Tracker.↵
↵
↵
---↵
↵
## Technical Details↵
↵
A few implementation details that people here may be interested in:↵
↵
* Uses official Codeforces problem ratings.↵
* Counts only distinct solved problems.↵
* Team submissions are excluded.↵
* Multiple accepted submissions do not inflate statistics.↵
* Handle ownership is verified using a Compilation Error submission (no passwords or account access).↵
↵
The project is completely open source.↵
↵
---↵
↵
## Current Limitations↵
↵
* Statistics depend on Codeforces data synchronization.↵
* Duels require two users online at the same time.↵
↵
---↵
↵
## Feedback↵
↵
I'd really appreciate feedback from the Codeforces community, especially on the **Drill** recommendations.↵
↵
If the generated practice sets don't match your actual weaknesses, or if you have ideas for improving the training workflow, I'd love to hear them.↵
↵
Thank you for reading!↵
↵
— **joyboy24**↵
