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.
It dseon't mettar waht oedrr the lrettes in a wrod are.
Angle between two vectors
Are all the three given point in the same line?
Check that number is whole number
Decimation - Optimized for speed
Miles to go before I sleep
If you prick us, do we not bleed?
A (wrong) place for everything, and everything in its (wrong) place
Some Assembly Required
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