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"E. Compress Words" Problem Amugae has a sentence consisting of $n$ words. He want to compress this sentence into one word. Amugae doesn't like repeti 阅读全文
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D. "White Lines" Problem Gildong has bought a famous painting software cfpaint. The working screen of cfpaint is square shaped consisting of $n$ rows 阅读全文
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"C. Round Corridor" Problem Amugae is in a very large round corridor. The corridor consists of two areas. The inner area is equally divided by $n$ sec 阅读全文
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"B. Block Adventure" Problem Gildong is playing a video game called Block Adventure. In Block Adventure, there are n columns of blocks in a row, and t 阅读全文
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"A. Hotelier" Problem Amugae has a hotel consisting of $10$ rooms. The rooms are numbered from $0$ to $9$ from left to right. The hotel has two entran 阅读全文