摘要：
Description Have you ever tried to explain to the coordinator, why it is eight hours to the contest and not a single problem has been prepared yet? Mi 阅读全文
摘要：
Description Snark and Philip are preparing the problemset for the upcoming pre qualification round for semi quarter finals. They have a bank of n prob 阅读全文
摘要：
Description You are given n strings s1, s2, ..., sn consisting of characters 0 and 1. m operations are performed, on each of them you concatenate two 阅读全文