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C. Harmony AnalysisThe semester is already ending, so Danil made an effort and decided to visit a lesson on harmony analysis to know how does the prof... 阅读全文
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B. Vika and SquaresVika hasnjars with paints of distinct colors. All the jars are numbered from1tonand thei-th jar containsailiters of paint of colori... 阅读全文
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A. Pasha and StickPasha has a wooden stick of some positive integer lengthn. He wants to perform exactly three cuts to get four parts of the stick. Ea... 阅读全文
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A palindrome is a word, number, or phrase that reads the same forwards as backwards. For example,the name “anna” is a palindrome. Numbers can also be ... 阅读全文