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.
Project Euler: Problem 8, Find largest product in a large string of numbers
Remove NaN ?
Set the array elements whose value is 13 to 0
subtract central cross
The glass half full
Break it up! Break it up!
The cake is a lie...
Crunch that matrix!
How brilliant are you?
Give me Hamming on five, hold the mayo
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