上传的文件包含6个： 计算器、二叉树、排序、哈希查找、图的遍历和最小生成树。-Upload file contains 6: calculator, binary tree, sorting, hash search, graph traversal and the minimum spanning tree.

the difference between binary search tree and AVL tree in the insert method by estimated run time.

本实验实现的是链表结构的多项式相加，为数据结构必做实验，仅上传cpp文件，读者可在编译器上自行编译实现。-The experimental realization of the list structure of polynomial for the data structure must do the experiment, only upload cpp file, the reader can compiler to compile your own implementation.