true 1 15 radians decimal true

what does the summatory now

 0 0 0 0 0 5 1 mat

the expected value is

#

this is the problem!

 1

from here, there is no problem!

the improvement that you introduced would be doing two iterations in these cases, isnt?

 5

in the second one,we only need to have a zero result, because no iteration will happen from 3 to 2 if going forward

A great solution would be something like "forcing" the notation:

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

this is incompatible with going forward, so the result is 0, but not an error

this is compatible with going backward, so the result is 5