This is Spring 2021 of CS50 (aka CSCI E-50) at Harvard Extension School. Looking for Summer 2021 or Fall 2021?

Week 1

Lecture
- Audio
- Notes
- Slides
  - Google Slides
  - PDF
- Source Code
  - Index
  - PDF
  - Zip
- Subtitles
- Transcript
- Video
  - CS50 Video Player
  - MP4
    - 360p
    - 720p
    - 1080p
    - 4K
  - YouTube
Quiz 1
Lab 1
- Solution Walkthrough
- Staff Solution
Shorts
Problem Set 1
- Staff Solutions