What is this digit operation?
0 -> 0
1 -> 9
121 -> 9
44 -> 6
15 -> 5
1243 -> 7
Replace May with April
Getting logical indexes
Maximum value in a matrix
Fibonacci-Sum of Squares
Can you beat the lottery again (for hardcore coder) ?
Permute diagonal and antidiagonal
How many monitors are connected ?
Numbers spiral diagonals (Part 1)
Numbers spiral diagonals (Part 2)
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