摘要：
总是不能正确的将一个大问题变成子问题，而且又找不到状态转移方程。 直接导致这题想了5个小时最后还是无果。。。谨记！Number StringTime Limit: 10000/5000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1136Accepted Submission(s): 503Problem DescriptionThe signature of a permutation is a string that is computed as follows: for eac 阅读全文