ghost的树型分组的代码分享出来啦!!大家速度下哦-ghost tree group to share the code coming out!! Oh you speed

编写地鬼算法计算二叉树中叶子节点的数目，并求出位于先序序列中第K个位置的节点-Binary tree algorithm to ghost write in the number of leaf nodes, and find the sequence of the first order in the first position of the node K

人鬼过河问题的通用解法，程序可以找出所以的路径，并以坐标的形式返回，比如3人3鬼过河，则起始坐标为(3,3)，全部过河后的坐标为(0,0)-Human And Ghost Pass The River，The Program can find All Routs