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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.
testA are 100 random tests, sqrt is used but not directly when calculating m value in the control function, if it is so important in your code, you'll have to try another way.
Don't guess the input, print it: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#print-input and you'll have the exact input yourself, your guesses are wrong.