校园导航 设计学校的平面图，至少包括10个以上的场所，每两个场所间可以有不同的路，且路长也可能不同，找出从某个场所到达另一场所的最佳路径（最短路径）。 -Campus navigation Design your school plan, including at least more than 10 places, one of the two places can have different between the way, and road long can also be