关于图的十字链表存储，由于动态二维数组有上限，不能处理超过0x7fffffff的数据。因此需要占有资源更小的十字链表存储，但是其过于复杂；-Orthogonal list storage on the map, the dynamic two-dimensional array with an upper limit, can not handle exceed 0x7fffffff of the data. Need to occupy the resources of smaller cross-linked list storage, but its too complicated