摘要：
We were afraid of making this problem statement too boring, so we decided to keep it short. A sequenceis called non-boring if its ever... 阅读全文
摘要：
Professor GukiZ is concerned about making his way to school, because massive piles of boxes are blocking his way.In total there are n ... 阅读全文
摘要：
在纺织CAD系统开发过程中，经常会遇到纱线排列的问题。 该问题的描述是这样的：常用纱线的品种一般不会超过25种，所以分别可以用小写字母表示不同的纱线，例如：abc表示三根纱线的排列；重复可以用数字和括号表示，例如：2(abc)表示abcabc；1(a)=1a表示a;2... 阅读全文