edu - Guided Learning Paths

Role

cp4.vn/edu is for guided lessons, learning paths, and classroom-oriented content.

It separates learning order from the handbook so learners can study in a coherent progression instead of jumping through isolated articles.

Preface preview

Purpose

• Separate learning-oriented content from reference docs.
• Grow each topic step by step, from small examples to complete templates.
• Guide students from first exposure to harder problems and confident contest solving.

Beginner Path

This is the first ordered path on cp4cpp.com/edu. It assumes no prior C syntax knowledge, and it assumes a working C setup that can build and run a single source file. Installing a compiler or an editor is outside this path.

1. Lesson 1 - Your First C++ Program covers how source becomes a running program, then prints one fixed line.
2. Lesson 2 - Input, Variables, Computation, And Output reads two integers into named variables and prints their sum.
3. Lesson 3 - First Judge-Style Arithmetic Task reads a rectangle length and width in a fixed format and prints the perimeter.

Work through them in order. Each lesson depends on the one before it.

Lineage

Project	Meaning	Time	Form
C2G2	Coder To Geometry 2D	Jun 2023	HackMD
EDU	Explain Demonstrate Use	Feb 2022	Discord
KDT	Knapsack Da Tutorial	Jul 2021	Codeforces
MLSR	Minimal Lexicographical String Rotation	Apr 2021	Codeforces
A347221	Number of nonnegative ordered triples with a+b+c <= S and a*b*c <= T	Aug 2021	OEIS
VAICPRTSPA	Variant of a counting problem related to square product	Aug 2021	Discord

References

Short	Project	Use
USACO-GUIDE	USACO Guide	Curated resources, roadmap, and modules.
CF-EDU-COURSE	Codeforces EDU	Topic lessons for competitive programming.
CSES-PROBLEMSET	CSES Problem Set	Structured classical practice.
EDU-ATCODER-DP	Educational DP Contest	Focused DP progression.
CF-BLOG-88660	Knapsack Da Tutorial	Knapsack learning path.
CF-BLOG-90035	LMSR	Lexicographically minimal string rotation.
CF-BLOG-93981	A347221	Counting triples.
CF-BLOG-96498	VAICPRTSPA	Square-product counting variants.

Learning Style

DFS-like learning: users follow a path whose lessons depend on earlier lessons and raise difficulty over time.

Strengths To Preserve

• Guided paths reduce confusion for beginners and save review time for advanced learners.
• Progress signals help people study steadily with a coherent roadmap.

Weaknesses To Fix

• Platforms often point to problems without explicitly modeling what skill changed after solving them.
• Every new lesson implies prerequisites, exercises, progression logic, and update cost.

CP4CPP Rules

• Each lesson should state prerequisites, target skills, practice tasks, and next steps.
• Each problem should have nested and consistent subtasks when later subtasks are strict supersets.
• edu may reuse doc pages, but should not duplicate them line-for-line.