the test suit is wrong
hehe, for now there is only one solution which works correctly when there is a NaN or an Inf in the input.
I have added NaN and Inf to the test suites
"the test suit is wrong" statement is not true.
Replace Vector Elements
Make a run-length companion vector
Deleting an element in a matrix
Go back n times
replace nan values iteratively.
'5*3' copy character 3 - five times
Longest Sequence of NaNs
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