h3. Explicaţie

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In the {**first sample case**} Valerio is beneath manhole $0$, and there is a single patrol watching manhole $1$.
In the first minute Valerio moves to manhole $1$ while the patrol moves to manhole $2$.
In the second minute Valerio moves to manhole $2$ while the patrol moves to manhole $0$, making it out safely in $2$ minutes.
 
In the {**second sample case**} it takes Valerio $5$ minutes to escape while avoiding the patrols.

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