I assume you mixed up x and y.

If you intended to use x as horizontal size, y as vertical size, you need to access the maze like maze[y][x].

Maybe you miss out the following description:

choosing a single number and moving it some number of positions to the left.

You can't move number to the right.

RRDRRRRRURRRRDRDRDLDRU

@Blind4Basics:
Sorry, I didn't know that playing with other solutions could cause issues. I'll use the Fork link when I want to try other solutions.

In C++ version, this kata has performance issue.
I constantly got "Execution Timed Out (12000 ms)" error. (If I'm lucky, my code completes all test cases in 12 seconds, but it is rare case😥)
I checked more than 5 other existing solutions, but all of them had the same issue.

I'm not sure but I think it is because _fib.cache is always initialized when fibonacci function is called. You need to keep the cache data for better performance.

String can have leading/trailing spaces, you should not count them;