A problem is in P if it can be solved quickly by a computer, and in NP if a solution can be verified quickly.
挑战在于用最少的东西表达最多的内容。
【释义】保卫一家一姓的政权,是那些居高官、享厚禄的君臣们谋划的事;而保卫整个民族的文明、伦理与文化,即使是卑微的普通百姓,也有责任。