AtCoder Beginner Contest
Incredibly educational problems on AtCoder, especially problem G that we didn't solve, but read the editorial on after the contest ended.
Timestamps:
0:00 Intro
1:04 Problem A
1:54 Problem B
8:09 Problem C
18:08 Problem D
27:45 Problem E
36:15 Problem F&G
1:28:08 Explanations
