algorithm - Obtaining the powerset of set with subsets of a certain size in Java -


i'm trying find efficient manner generate powerset of set has subsets of size k. have found answers of how generate powersets , powersets within range, i'm not sure how if wanted 1 size.

thanks!

create list containing elements of set.

create second list consisting of 1's , 0's,

  • the total number of elements in list equal number of elements in set
  • the number of 1's in list equal k

for each permutation of second list, subset consists of elements first list corresponding entry in second list 1.


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