摘要：Necklace of Beads Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1036 Accepted Submission(s): 37 阅读全文

摘要：Magic Bracelet Time Limit: 2000MS Memory Limit: 131072K Total Submissions: 6195 Accepted: 1969 Description Ginny’s birthday is coming soon. Harry Pott 阅读全文

摘要：Birthday Toy Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 866 Accepted Submission(s): 456 Prob 阅读全文

摘要：Color Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 11758 Accepted: 3783 Description Beads of N colors are connected together into a circ 阅读全文

摘要：Cipher Bob and Alice started to use a brand-new encoding scheme. Surprisingly it is not a Public Key Cryptosystem, but their encoding and decoding is 阅读全文

摘要：Permutations Permutations We remind that the permutation of some final set is a one-to-one mapping of the set onto itself. Less formally, that is a wa 阅读全文