A lot of beautiful solutions.
Now, that's a neat and cool solution.
Very neat solution
He just wrote all the matrices...that's not neat, but everyone has the right to an opinion.
Another good one.
Test for balanced parentheses
Distance walked 3D
convert matrix to single column
Dimensions of a rectangle
Find same numbers touching each other...
Morse Code Generator! Try it!
Backslang, odds are you used it at some point in time...
Find number patterns in rows of a matrix...
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