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题目链接; 题目描述: Petya loves lucky numbers very much. Everybody knows that lucky numbers are positive integers whose decimal record contains only the lucky 阅读全文
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题目链接; 题面: ...Once upon a time a man came to the sea. The sea was stormy and dark. The man started to call for the little mermaid to appear but alas, h 阅读全文
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C. Vacations time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output C. Vacations time limit per 阅读全文