That was a good hint (and sorry hacking was similarly fun)
it is hard to find the proper function. I find it by giving a wrong input to p file and cody give error message. See the last line that start with "Error" of Solution 518661 , Solution 518360 and
This is the solution I was looking for. I think it ends this "unintended" hacking series, :-(
Good work to improve the test suite. But I have to say it can be solved the proper way. Yes, it seems impossible but the third value of "x" is still, surprisingly, out there. What is @()1 used for?
Find common elements in matrix rows
Calculate Euler's phi function
Sum the elements in either diagonal of a square matrix
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