![[POJ1847]（最短路floyd）TramPOJ1847Tram](/uploads/reation/bcimg13.png)
[POJ1847]（最短路floyd）TramPOJ1847Tram
POJ1847Tram题目Tram network in Zagreb consists of a number of intersections and rails connecting some of them. In every intersection there is a switch pointing to the one of the rails going out of the...
