摘要：
Moamen and Ezzat are playing a game. They create an array 𝑎a of 𝑛n non-negative integers where every element is less than 2𝑘2k. Moamen wins if 𝑎1& 阅读全文
摘要：
Problem Description As an elegant and accomplished girl, Bella loves watching stars at night (especially the Polaris). There are totally n stars in th 阅读全文