A request to all problemsetter, testers and anyone associated with a contest.
Please create strong pretest.
Problem A in Round 671 had such weak pretests.
Same goes for D2 and C.
and many people failed on other problems as well.
I feel terrible right now... I got FST in A,C,D2 at the same contest.. this is ridiculous... Maybe spend sometime more on pretests next time.
Maybe, you should practice enough, so that you don't get WAs. Please don't take it as an offense but, if pretests are weak, then they are weak for all, and everyone is at disadvantage in that situation. It's okay, if your contest went bad, it happens with many people, but don't blame weak pretests for it.
I don't know if this is always the case, but in one contest I've tested, tester solutions in virtual participation ran straight on the full test set instead of just pretests, so in that case number of testers was irrelevant to pretests.
Why did you write this from twink?