跟长龙和反长龙概率

简介：Jining, Jinxiang County, Shanxian County, Guide. These four places are four points on a straight line. If the officers and soldiers want to recover Guide from Jining, they have to go through Jinxiang County and Shan County. Similarly, if the bandits from Guide want to harass the officers and soldiers in Jining, they have to go You cannot pass through these two counties.