本页保存的是公开项目资料快照，阅读过程不需要连接 GitHub。

awesome-competitive-olympiad-algorithms

简体中文

A personally curated archive of original algorithmic problems and lecture notes — every problem authored and set by hand — spanning NOIP through NOI and ACM-ICPC level. Centered on the algorithmic craft shared by informatics olympiads and ACM-ICPC-style contests: design, analysis, and proof — not low-level implementation.

About

This repository collects materials I created over years of competing and problem setting in algorithm contests — all original work:

• Lecture slides — notes prepared for teaching sessions.
• Original contest problems — problems I set for the National Olympiad in Informatics (NOI), provincial team selection, and mock contests.

Difficulty ranges from NOIP all the way up to NOI and ACM-ICPC level.

Whether you aim for OI, ACM-ICPC, or simply want to study rigorous algorithm design, I hope this archive offers something useful. If it does, a star would mean a lot — and would help more people discover it.

Each problem is preserved with three artifacts:

• statement — the problem description
• standard solution — a reference C++ implementation
• editorial — the algorithm explained, with correctness and complexity

Structure

.
├── Lectures/   Algorithm lecture slides and notes
└── Setter/     Original problems, grouped by contest
    ├── NOI/    National Olympiad in Informatics
    ├── BJTSC/  Beijing Team Selection Contest
    └── NOIP/   National Olympiad in Informatics in Provinces

Directory	Contents
Lectures/	Lecture slides and notes on algorithms: data structures, graph theory, number theory, generating functions, and more.
Setter/NOI/	NOI problems and NOI-level mock contests.
Setter/BJTSC/	Beijing Team Selection Contests, including the joint provincial selection and related mock rounds.
Setter/NOIP/	NOIP-level mock contests.

---

Note — All lecture slides and editorials are written in Chinese.

License

• Code (standard solutions / .cpp): MIT License
• Content (problem statements, editorials, lecture slides): CC BY-NC-SA 4.0

Updates

• upd0909: Add 12 new lecture slides and the MIT License; complete the missing solutions for BJTSC Mock-1 and NOI Mock-1.