Prince_NYing的博客

题目描述 You are a member of a naive spy agency. For secure communication,members of the agency use a very simple encryption algorithm – which changes each symbol in the message ‘progressively’, i.e., ba...

题目描述 One of our delivery robots is malfunctioning! The job of the robot is simple; it should follow a list of instructions in order to reach a target destination. The list of instructions is original...

题目描述 Lots of runners use personal Global Positioning System (GPS) receivers to track how many miles they run. No GPS is perfect, though: it only records its position periodically rather than continuo...