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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.
I experienced the same issue of everyone
After working on dtype of index and things like this, I checked if a hunch was correct,because in the random tests, one test was right and the following wrong and viceversa
I created a global variable and each time my function was called I increased the variable and I find out that my function was called only when the test was wrong and it wasn't called when the test was right, in the end i tried to modify my solution to get wrong results on purpose and I still got 50% of successful test.
So i think the problem is how they check our solutions!!!
for me it's been usefull to spend little time writing several lines of code to solve a kata and find out a buit-in function or a faster way to do the same thing, this way i will hardly forget it
I wrote the same solution , but instead of 35 25 15 I used 200 200 100 because it works even with bigger nunbers, so you don't need to be accurate