The inverse modulus would be to find X such that mod(X,Y) = M where M and Y are known (or X === M (mod Y)); this is the chinese remainder theorem which is generalized for any number of Y's and M's when all have the same X and the GCD of all Y = 1 (greatest common divisor). The author is actually requesting Y*Z + M = X*B, which is not the same thing, or the inverse modulus.
Sorry about that...it was only for learning purposes...
Count from 0 to N^M in base N.
Distance walked 2D
Construct a string from letters and counts
Find the sum of the elements in the "second" diagonal
Magic is simple (for beginners)
Longest Sequence of NaNs
Mean = Standard Deviation
Recaman Sequence - III
Challenging perms function!
Create co-occurrence matrix
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