摘要：
B Maximal Continuous Rest Each day in Berland consists of n hours. Polycarp likes time management. That's why he has a fixed schedule for each day — i 阅读全文
摘要：
A Serval and Bus It is raining heavily. But this is the first day for Serval, who just became 3 years old, to go to the kindergarten. Unfortunately, h 阅读全文