一个人的旅行，应用dijkstra

输入数据有多组，每组的第一行是三个整数T，S和D，表示有T条路，和草儿家相邻的城市的有S个，草儿想去的地方有D个；

接着有T行，每行有三个整数a，b，time,表示a,b城市之间的车程是time分钟；(1=<(a,b)<=1000 a,b 之间可能有多条路)

接着的第T+1行有S个数，表示和草儿家相连的城市；

接着的第T+2行有D个数，表示草儿想去地方。

输出ZJB能去某个喜欢的城市的最短时间，如都不能到达，输出-1。-A person' s travel, the application of the input data dijkstra how groups of three integers is the first line of T, S and D, expressed T road, and adjacent to the city' s grass house with S a, grass want to go there are D　Then there are T lines, each line contains three integers a, b, time, represents a, b drive between cities is time minutes　(1 = < (a, b) < = 1000　a, b possible between multiple routes) followed by the first line of the S T+1 number, which means that the grass family and is connected to a city　followed by the first T+2 line with the D number, which means that the grass to go places. Output ZJB able to go to a favorite city of the shortest time, if can not arrive, output-1.