对一个文件中的三角形和四边形的数目进行统计，并且判断出三角形和四边形的最大边界和最小边界。对读文件和绝对值的只是帮助比较大。-Statistics on a document, the number of triangles and quadrilaterals, and determines the maximum boundary of the triangular and quadrilateral, and the minimum boundary. Helpful to read th