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.
give nth decimal place of pi
"Look and say" sequence
Volume of a Parallelepiped
Rotate input square matrix 90 degrees CCW without rot90
There are 10 types of people in the world
Pandigital Multiples of 11 (based on Project Euler 491)
Go to the head of the class!
Numbers in extended form
Piecewise linear interpolation
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