The Round #252 is just ten minutes left. I'm not doing so good as I've thought. Maybe when I skimmed through the problems for the first time, I think they were all not that hard.Especially for the problem B,C,D-I have some ideas about them. However, when I programmed the problem B and found I couldn't debug it right, I am a little bit afraid of it... And then.... I found the problem E is very interesting, and I lost myself in the mathematical derivation, but I just couldn't check all the kinds of situation correctly...

So as a result, I've finished no problems except the easiest one.. I think this time my rating will be going down again, and maybe the reason is that I can't focus on a single problem's solving...

Wow, how I want to become the (rank==1) one... I will keep fighting!!

May the force be with us~