世界名画陈列室由m*n个排列成矩形阵列的陈列室组成。为了防止名画被盗，需要在陈列室中设置警卫机器人哨位。每个警卫机器人除了监视它所在的陈列室外，还可以监视与它所在的陈列室相邻的上、下、左、右4个陈列室。试设计一个安排警卫机器人哨位的算法，使得名画陈列馆中每一个陈列室都在警卫机器人的监视下，且所有的警卫机器人数最少。-Gallery by the world famous painting of m* n rectangular array arranged in the composition of the showroom. In order to prevent the paintings were stolen, need to set up showroom robot sentry guards. In addition to monitoring the security of each robot in the showroom it also can monitor it in the showroom and the adjacent upper and lower, left and right four showrooms. Try to design a robot sentry security arrangements of the algorithm, making each painting a showroom gallery in the security surveillance robots, and all at least a few of the security robot.