摘要：
E. Dima and HorsesDima came to the horse land. There are n horses living in the land. Each horse in the ho... 阅读全文
摘要：
B. Dima and SequenceDima got into number sequences. Now he's got sequence a1, a2, ..., an, consisting of n... 阅读全文
摘要：
Emuskald is an avid horticulturist and owns the world's longest greenhouse — it is effectively infinite in... 阅读全文
摘要：
C. Magical BoxesEmuskald is a well-known illusionist. One of his trademark tricks involves a set of magica... 阅读全文
摘要：
B. MultithreadingEmuskald is addicted to Codeforces, and keeps refreshing the main page not to miss any ch... 阅读全文