24:05 duration 24 minutes 5 seconds
Sample solving 28
27:26 duration 27 minutes 26 seconds
Sample Solving 32
21:52 duration 21 minutes 52 seconds
Sample Solving 22
11:08 duration 11 minutes 8 seconds
Lecture-38
14:55 duration 14 minutes 55 seconds
Lecture-34
21:27 duration 21 minutes 27 seconds
Lecture-29