Taken all in training when talking about graph theory:
1. light graph theory test not something that usually appears as a vassal DP.
2. If not fool the foreigners do not recognize SPFA, usually it can be used dij dij.
3. That thing (refers to the bellman-ford) in addition to forfeit ring hanging with nothing.
4. Direct transfer is not difficult to feel (shoot-out title).
5.NOIP speaking words will backplane daughter (refer tarjan) on the line.
6. engage directly on the line (bridge problem).
7.GL & HF (rolled, Hao Fan / good luck and have fun)