You've got a pretty good ELO, and are brave for publishing it. How often do you play?
Encode Roman Numerals
Find the sum of the elements in the "second" diagonal
Back to basics 12 - Input Arguments
~~~~~~~ WAVE ~~~~~~~~~
Find the 9's Complement
Mysterious digits operation (easy)
Find indices of diagonal elements
Two functions (to be sure)
Longest Collatz Sequence
Getting the indices from a matrice
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