摘要： http://acm.hdu.edu.cn/showproblem.php?pid=1165不看题解，使劲找规律，应该是可以找到的，就是费时间！Problem DescriptionAs is known, Ackermann function plays an important role in the sphere of theoretical computer science. However, in the other hand, the dramatic fast increasing pace of the function caused the value of Ackerman 阅读全文

摘要： http://acm.hdu.edu.cn/showproblem.php?pid=1274展开字符串Time Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 1102Accepted Submission(s): 495Problem Description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 阅读全文