摘要：
Problem DescriptionXiao Ming is a citizen who's good at playing,he has lot's of gold cones which have square undersides,let's call them pyramids.Anyon... 阅读全文
摘要：
Problem DescriptionDue to the curse made by the devil,Xiao Ming is stranded on a mountain and can hardly escape.This mountain is pretty strange that i... 阅读全文
摘要：
Problem DescriptionTerrorists put some mines in a crowded square recently. The police evacuate all people in time before any mine explodes. Now the po... 阅读全文