摘要：When wake up, lxhgww find himself in a huge maze. The maze consisted by N rooms and tunnels connecting these rooms. Each pair of rooms is connected by 阅读全文

摘要：Background If thou doest well, shalt thou not be accepted? and if thou doest not well, sin lieth at the door. And unto thee shall be his desire, and t 阅读全文

摘要：问题： You live in a village but work in another village. You decided to follow the straight path between your house (A) and the working place (B), but t 阅读全文