I've improved grammar in this problem and updated it with a test case ensuring that the det() function is not used. Rescoring of previous answers will take time to propagate, though
I also modified the test suite to check for sums of absolute errors under a threshold value rather than isequal(), since that can fail when the answer isn't composed purely of integers.
I see you! :)
How to find the position of an element in a vector without using the find function
Return unique values without sorting
Replace Nonzero Numbers with 1
Create a Matrix of Zeros
Add Me To Death (Sum sum sum)
Get all prime factors
Combine the digits to output numbers
Creating a code via test suite :)
Implement zero-based indexing for Matrices
Create cosine function out of sine
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