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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
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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
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Problem B. Harvest of Apples Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 2970 Accepted Subm 阅读全文
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Problem J. Let Sudoku Rotate Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 530 Accepted Submi 阅读全文
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Problem E. Matrix from Arrays Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 419 Accepted Subm 阅读全文