I understand the problem but not the tests
It seems like the water content halves every ~69 minutes. But the first sentence about 100% and 100 minutes are very confusing. If it is exponential decay, then water should never reach 0.
Remove any row in which a NaN appears
Get the area codes from a list of phone numbers
The sum of the numbers in the vector
Distance walked 2D
How to subtract?
Given n, create n random numbers such that their standard deviation is also n.
How many palindromes?
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