摘要：
[AtCoderContest075F]Mirrored 试题描述 For a positive integer $n$, we denote the integer obtained by reversing the decimal notation of n (without leading z 阅读全文
摘要：
[AtCoderContest015D]A or...or B Problem 试题描述 Nukes has an integer that can be represented as the bitwise OR of one or more integers between $A$ and $B 阅读全文