Pololu 0J5840, Руководство пользователя

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When we encounter the first intersection after our first “back” action, we know we have reached a dead
end that can be removed from our list of actions. In this case, the most recent actions in our list is the
sequence ‘SBL’, and the diagram shows that this sequence can be simplified into a single right turn
‘R’.
Prune out the rest of this dead-end branch as we back-track.
Pololu 3pi Robot User’s Guide © 2001–2019 Pololu Corporation
8. Example Project #2: Maze Solving Page 48 of 85