The grades I have so far are posted. The best R-precision on HW 2 was .4147 (average around .33) and the best F1 score on HW 3 is .3988 (average around .32).
Your scores for HW 2 will be your points for Part 1 plus (YourRPrecision/.4147)*50. For HW3, if you handed something in that works, your score will be 50 + (YourF1/.3988)*50.
If you have a 0 anywhere and you sent me that HW then it probably means your input was badly formed and you broke the grading script. Send me mail and I'll tell you what it looks like.