摘要：
D. LCIS time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output This problem differs from one whi 阅读全文
摘要：
C. Digital Root time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Not long ago Billy came 阅读全文
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E. Interesting Graph and Apples time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output Hexadecima 阅读全文
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D. How many trees? time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output D. How many trees? time 阅读全文