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.
The Goldbach Conjecture, Part 2
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)
Maximum value in a matrix
Mersenne Primes vs. All Primes
I've got the power! (Inspired by Project Euler problem 29)
Fun with a compass
"Find out the best cricket"
Give me Hamming on five, hold the mayo
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