No need to feel stupid, it was not an easy problem. Learn from it and keep going.

nice answer, really gave me some good ideas to try it again

@123xylem if smaller number preceeds a larger one, both digits make up a number and so you need to skip the next itiration, otherwise you would double count the following digit. E.g. 4 = IV. If you didn't skip you'd count 4 + 5 (IV + V).

cause u add pairs of number in sum

the "if" statement accounts for those values by subtracting a number from the sum if it is to the left of a larger number

for instance...

MCMXC = [1000, 100, 1000, 10, 100]

if(data[numbers[i]] < data[numbers[i+1])... this is triggered when data[numbers[1]] AKA 100 is less than data[numbers[1+1]] AKA 1000

so...sum += data[numbers[1+1]] - data[numbers[1]] AKA 1000 - 100

This fails the number 1990 (MCMXC) from the description.
You are missing CM, CD, XC, XL, IX, IV.

The solutions are correct because the description states "You don't need to validate the form of the Roman numeral."

However with this, the problem definitely doesn't feel like a level 4 kata

Most of the solutions I see there are not correct. For example your solution accepts "XXIC". You must check the correctness of order.The tests are way too weak.

So happy to see my solution on the top YEAHHH :D

it doesn't need to be converted.
because strings also have the attributes length and index.