I think the third example in the problem statement is incorrect. The input is a row (it's set up as a column, but then is transposed), but the output is a column.
There may have some limitations when resulting rows are with different lengthes.
Distance walked 2D
Replace Vector Elements
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Check if number exists in vector
Try 1.5.4: Celsius to Fahrenheit
Create a dictionary
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