This is CS50x 2021, an older version of the course. See
cs50.harvard.edu/x
for the latest!
Week 0
Scratch
Lecture
Audio
Demos
Grumpy Cloud FLIPBOOK
Searching a Phone Book Efficiently
Searching a Phone Book Inefficiently
Notes
Slides
Google Slides
PDF
Source Code
Index
Studio
Zip
Subtitles
Transcript
Video
CS50 Video Player
MP4
360p
720p
1080p
4K
YouTube
Problem Set 0