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.
Times 2 - START HERE
Back to basics 9 - Indexed References
Set the array elements whose value is 13 to 0
Convert to Binary Coded Decimal
Predicting life and death of a memory-less light bulb
Sums of Multiple Pairs of Triangular Numbers
A matrix of extroverts
Highest powers in factorials
Give me Hamming on five, hold the mayo
Rewrite setdiff to account for non-unique values
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