Inverseaza reviziile

Diferente pentru problema/marathon intre reviziile #4 si #3

Diferente intre #4 si #5
Diferente intre #2 si #3

Nu exista diferente intre titluri.

Diferente intre continut:

The total distance is $6 + 21 = 27$.

In the second sample case there are no checkpoints, so William must run directly from $0$ to $3$. The shortest path is $0$ -> $2$ -> $1$ -> $3$.

In the \textbf{second sample case} there are no checkpoints, so William must run directly from $0$ to $3$. The shortest path is $0$ -> $2$ ->  $1$ -> $3$.

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