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.
Find common elements in matrix rows
Calculate the Levenshtein distance between two strings
Largest Twin Primes
Breaking Out of the Matrix
Go to the head of the class!
Kurchan 4x4 - Optimal score
Must be in the front row...
Decimation - Optimized for speed
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