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D. Mishka and Interesting sum D. Mishka and Interesting sum Little Mishka enjoys programming. Since her birthday has just passed, her friends decided 阅读全文
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Turing Tree Description After inventing Turing Tree, 3xian always felt boring when solving problems about intervals, because Turing Tree could easily 阅读全文
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Rikka with Parenthesis II Problem Description As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math ta 阅读全文
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Ball Description ZZX has a sequence of boxes numbered 1,2,...,n. Each box can contain at most one ball. You are given the initial configuration of the 阅读全文