== include(page="template/taskheader" task_id="patrol2") ==

Valerio is robbing a bank, but an alarm started ringing as he was trying to break into the caveau.
 
He needs to get out as fast as possible through the twisted sewer tunnels running nearby the bank.
 
The police is already looking for him and has sent $K$ patrols, indexed from $0$ to $K-1$ to guard the manholes connected to the sewer system.
There are $N$ manholes, indexed from $0$ to $N-1$ and $M$ tunnels connecting pairs of them. Valerio's friend Filippo is waiting for him nearby manhole $N-1$, if he can reach it, he will escape safely.

Poveste şi cerinţă...

h2. Date de intrare