利用回溯算法解决组合问题。构造虚拟二叉树，采取深度优先搜索方式得到解。-Backtracking algorithm to solve combinatorial problems. Construct a virtual binary tree, the depth-first search to get the solution.

对二进制传统搜索算法及二叉树和四叉树的混合算法进行了matlab程序仿真-Binary search algorithm and mixed traditional binary and quad-tree algorithm were matlab simulation program