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.
Remove NaN ?
Implement simple rotation cypher
Create matrix of replicated elements
Find last zero for each column
Is it really a 5?
Diophantine Equations (Inspired by Project Euler, problem 66)
Breaking Out of the Matrix
I've got the power! (Inspired by Project Euler problem 29)
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