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《Concerto For Piano And Orchestra No. 1 In E minor, Op.11》 Chopin 我听的是齐默尔曼的录音版本，自从听了他的《肖邦第一叙事曲》之后，我就比较喜欢听他弹奏的的肖邦了，但是夜曲还是比较喜欢鲁宾斯坦的版本。（歌曲链接：https://musi 阅读全文
摘要：
Today at the lesson of mathematics, Petya learns about the digital root. The digital root of a non-negative integer is the single digit value obtained 阅读全文
摘要：
You are given a sequence ss consisting of nn digits from 11 to 99. You have to divide it into at least two segments (segment — is a consecutive sequen 阅读全文