摘要：
Grammy is playing a game with her roommate Alice on a sequence 𝐴A with 𝑛n non-negative integers 𝐴1,𝐴2,…,𝐴𝑛A1,A2,…,An. The rules of the game are 阅读全文
摘要：
After the last network breakdown, you've been assigned to redesign the signal transmission network of ICPC (Internet Clogging Prevention Corporation)! 阅读全文