Harvard University · CS50x

CS50's Introduction to Computer Science

CS50 计算机科学导论

A broad introduction to computational thinking, programming, algorithms, data structures, and the web.

Subject：Python / C / SQL

Level：Introductory

Suggested stage：Year 1 (inferred)

Public-material edition：2026

Language：English

Videos：Available

Assignments / solutions：Available / Not verified

Prerequisites

No prerequisites.

Start here

All official course content

Lectures, video, assignments and exams are separated so you do not have to hunt through the course homepage.

23 direct tasks

▶Lectures, video & readingCourse content in the official sequence12

Week 0: Scratch Week 1: C Week 2: Arrays Week 3: Algorithms Week 4: Memory Week 5: Data Structures Week 6: Python Week 7: SQL Week 8: HTML, CSS, JavaScript Week 9: Flask Artificial Intelligence Week 10: The End

✓Assignments & practiceOpen the matching problem or assignment page10

Problem Set 0: Scratch Problem Set 1: C Problem Set 2: Arrays Problem Set 3: Algorithms Problem Set 4: Memory Problem Set 5: Data Structures Problem Set 6: Python Problem Set 7: SQL Problem Set 8: HTML, CSS, JavaScript Problem Set 9: Flask

◆Labs & projectsCourse projects, labs and milestones1

Final Project

Official resource hubs

Use these to browse a complete resource collection; the section above links directly to individual study items.

Weeks and lecturesHarvard CS50 OpenCourseWare ↗

Problem setsHarvard CS50 OpenCourseWare ↗

Final projectHarvard CS50 OpenCourseWare ↗

Source and verification

Every link points to an official university or course-team page. The year identifies the linked public-material edition, not necessarily the latest on-campus offering; a school may have newer materials that are not public. Unknown facts remain unverified rather than guessed.

Harvard CS50 OpenCourseWare · verified 2026-07-31

Open official course ↗Report a resource issue