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D. Tree time limit per test 2 seconds memory limit per test 512 megabytes input standard input output standard output You are given a node of the tree 阅读全文
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C. Permutation Cycle time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output For a permutation P 阅读全文
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B. Recursive Queries time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output B. Recursive Querie 阅读全文
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A. Palindromic Supersequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are giv 阅读全文