What is summer-camp?

This repository is a collection of study notes in Chinese, prepared for Peking University's computer science summer camp. In China, top universities run summer camps where undergraduate students compete for graduate program admission through written exams, interviews, and coding tests. This repository covers all three of those stages. The written exam section contains Markdown files on core computer science subjects: operating systems, networking, databases, computer organization, data structures, Linux basics, compiler theory, discrete mathematics, software engineering, and information security. There is also a set of files on artificial intelligence and machine learning, broken into sub-topics like deep learning, large language models, computer vision, natural language processing, and reinforcement learning. Each file is described as self-contained and can be read independently. The interview section includes a self-introduction template, a set of 50 or more common question-and-answer pairs across operating systems, networking, databases, algorithms, and system design, and a file on current technology topics like AI and distributed systems. The coding section focuses on C++ and covers standard algorithms in the order the README recommends studying them: basic algorithms, search, dynamic programming, and graph theory. All code templates use C++17. There is also a curated list of about 200 LeetCode problems organized by topic. A fourth section collects past exam papers for the Chinese national graduate admissions computer science exam (known as 408), covering 2009 through 2026, with answer keys. The README notes these were gathered from public sources and are for personal study only. All content is in Chinese, with English retained for technical terms like TCP, Cache, and Transformer.