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Another example is a T-intersection with a dead end on the left: ‘LBS’. The turns are 90° left, 180°,
and 0°, for a total of 90° right. The sequence should be replaced with a single ‘R’.
In fact, whenever we have a sequence like ‘xBx’, we can replace all three turns with a turn
corresponding to the total angle, eliminating the U-turn and speeding up our solution. Here’s the code
to handle this:
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8. Example Project #2: Maze Solving Page 45 of 85