I would not recommend taking cs 31 with this professor; there was 6 projects throughout the quarter and for the FIRST project I accidentally messed up my zip file I submitted and the professor said we could just contact him if we messed up the zip file for credit back for it maybe with a penalty. Throughout the quarter I emailed him like 5 times, talked to him after class about it 3 times, asked in his OH a couple times, asked the TA a couple times, and they only updated my grade in week 9 when I asked the TA in person and he assured me he would get it settled. So overall the professor is not helpful at all I knew if I had a question there was no way to contact him and get him to answer me (which I tried for other questions). The projects weren't that difficult and I got almost perfect scores on all of them and had a B in the class after the first midterm but ended up with a D in the class because the final was so difficult and very concentrated on concepts talked about in week 10. I also had outside circumstances that didn't help me to do well on the final and because the project scores were capped at 30% above the mean of the exam scores that made me fail the class. So would not recommend this professor he wasn't helpful or present.