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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Hey @newman-afk - you're not too stupid to solve it, it's just that you have to solve exercises in order of difficulty: the concepts you learn from solving lots of 7,6 kyu help with the 5, then onwards on to the 4 etc :) Everyone goes through the same process, and it just takes time to learn that's all.
Hey @newman-afk and welcome to Codewars!
As you can see, this is a 4 kyu kata so it's intended to be a bit more difficult - in general, beyond ~kyu 6 simple brute force approaches are unlikely to work. You need to find a smarter approach.
In the test cases, there are example inputs such as:
exp_sum(275), 1520980492851175that's a very big number to reach with exhaustive enumeration!
kata hint != kata suggestion (also use spoiler flag please
Please use Solutions section to discuss solutions. This is not a kata suggestion.