生成树病并出它的前序、中序、后序遍历 在判断平衡二叉树-Spanning tree disease and a pre-order it, in order, after traversing a binary tree in determining the balance

基于聚类算法的皮肤病实例，利用k均值算法对皮肤病进行聚类-Based clustering algorithm skin instance using the k-means algorithm clustering of skin diseases