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.
Make a Palindrome Number
Whether the input is vector?
Remove element(s) from cell array
Calculate Amount of Cake Frosting
Longest run of consecutive numbers
That's some divisor you've got there...
Return elements unique to either input
Sums of Distinct Powers
The cake is a lie...
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