摘要：
TanBig, a friend of Mr. Frog, likes eating very much, so he always has dreams about eating. One day, TanBig dreams of a field of coconuts, and the fie 阅读全文
摘要：
Mr. Frog learned a basic data structure recently, which is called stack.There are some basic operations of stack： ∙∙ PUSH x： put x on the top of the s 阅读全文
摘要：
Kim is a magician, he can use n kinds of magic, number from 1 to n. We use string Si to describe magic i. Magic Si will make Wi points of damage. Note 阅读全文