It's very sad that there is no matlab function "npermsk".
Not work for R is long, and k is small.
For example, R = 1:100, k = 2.
@li haitao, the max digital is 9. If length of R great than 10, it is another problem. I think you can submit a problem like this but larger R.
@ Binbin Qi, You're right.
Most nonzero elements in row
Reindex a vector
Length of the hypotenuse
Replace Nonzero Numbers with 1
5th Time's a Charm
Kurchan 5x5 - Optimal Score
Piecewise linear interpolation
Singularity v5 (with apologies to the true hack masters)
Matrix of Multiplication Facts
Circular Primes (based on Project Euler, problem 35)
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