all the homework and labs for cs61b spring official website: https://people.eecs.berkeley.edu/~jrs/61b/ video in youtube: https://www.youtube.com/channel/UCb3kaPBwg698iQokY3mCXhg forum: https://www.1point3acres.com/bbs/forum.php?mod=viewthread&tid=97510&fromuid=103252