摘要：
Recently, you bought a brand new smart lamp with programming features. At first, you set up a schedule to the lamp. Every day it ... 阅读全文
摘要：
You are given nn segments on a coordinate line; each endpoint of every segment has integer coordinates. Some segments can degener... 阅读全文
摘要：
Codehorses has just hosted the second Codehorses Cup. This year, the same as the previous one, organizers are giving T-shirts for... 阅读全文