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.
Back to basics 20 - singleton dimensions
Use of regexp
intersection of matrices
CONVERT TAN TO SIN
Predicting life and death of a memory-less light bulb
Sleeping Queens 1
The Hills Are Alive...
High Precision Square Root (Inspired by Project Euler 80)
Unique dice configurations
That's some divisor you've got there...
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