Permute diagonal and antidiagonal
For example [1 2 3;4 5 6;7 8 9] -> [3 2 1;4 5 6;9 8 7]
WITHOUT diag function (and variable name)
"max(...)" is clever!
High school cafeteria
Sum all integers from 1 to 2^n
Given a 4x4 matrix, swap the two middle columns
Matrix to column conversion
Is this triangle right-angled?
I want to know everything!
Mirror, mirror on the wall, who is fairest of them all?
Magic is simple (for beginners)
Divisors for big integer
Narcissistic number ?
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