有以下几个功能：

1.贪吃蛇一样行走

2.每走一步就得到其分数

3.分数为-1的地方不能前进

4.找到得到分数最高的路径-It has the following functions:

1. Snake Like walking

2. Each step is obtained fractions thereof

3. Score-1 place can not move forward

4. Find the path to get the highest score