What is this digit operation?
0 -> 0
1 -> 9
121 -> 9
44 -> 6
15 -> 5
1243 -> 7
Sort a list of complex numbers based on far they are from the origin.
Getting the indices from a matrice
Side of a rhombus
Mirror, mirror on the wall, who is fairest of them all?
Narcissistic number ?
Numbers spiral diagonals (Part 1)
Chess ELO rating system
Can you beat the lottery again (for hardcore coder) ?
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