The returned value will be negative in case of the following input (Will not be long):
int n = 2;
int m = 1000000000;
Plus, it takes too much time in case of such inputs as too many additional numbers are generated
with that range method then to be filtered.

Please don't post code...

ok a massive problem for me... !
done the code fine, but I keep failing the test where an empty array is handed to me, and then I cant coerce nil into integer. Thats fine.
I try every possible solution, break, exit, return, if statements when arr.empty? but none seem to work. Help?

I see your point, but 2 percent is not really 2.
2 percent is actually written as 0.02..
so you need to divide 2 by 100 to get 0.02
as a result you need to do the following
interest per day in decimal = (360 * 100) = 36000

Hint: division in ruby is floor division by default; e.g. 3 / 2 = 1

never round before the last step.