Introduction - If you have any usage issues, please Google them yourself
Job title data structure in order to turn a few even in the form of a string of data input from the keyboard. Such as: (A, B) from the starting node (the data field of the value of an uppercase letter A), to the end node (the data field of the value of an uppercase letter B) to the edge of the non- . Last input (Z, Z) represents the input end. Please use the adjacency without multiple tables to store the undirected graph, and note the use of dynamic storage structure must be