First I got WA#22 while I used double than I change to use longdouble instead of double and I got WA#24 After that I change floor(x)/ceil(x) to floor(x+esp)/ceil(x-esp) and I got WA#24 too But when I try to use double again I got AC! [It's strange,too strange.I hate Accuracy issues] (Sorry for my poor English XP)
