I'm preparing for interviews and I'm trying to memorize Heap's algorithm: procedure generate(n : integer, A : array of any): if n = 1 then output(A) else for i := 0; i < n; i += 1 do genera...

I need to iterate over permutations of a tuple of integers. The order has to be generated by swapping a pair of elements at each step. I found the Wikipedia article (http://en.wikipedia.org/wiki/H...

Given a list of values, such as vec![0, 0, 1, 2], I would like to create an iterator that generates all of its unique permutations. That is, [0, 0, 1, 2] [0, 0, 2, 1] [0, 1, 0, 2] [0, 1, 2, 0] [0, ...

I have spent the whole day (finally) wrapping my head around a permutation algorithm in practice for an admissions application on Friday. Heap's algorithm seemed most simple and elegant to me. he...

I basically need the equivalent result of the following Python itertools command in C: a = itertools.permutations(range(4),2)) Currently my process involves first "choosing" 5 elements fr...

can anyone tell me what exactly is the time complexity of this Heap's algorithm shown in wikipedia, https://en.wikipedia.org/wiki/Heap%27s_algorithm ? I searched several websites and the answers a...

I've attempted to write an implementation of Heap's Algorithm in C# which isn't working correctly. I'm trying to create a general-purpose implementation that will find all permutations of a string,...

Heap's algorithm enumerates the permutations of an array. Wikipedia's article on the algorithm says that Robert Sedgewick concluded the algorithm was ``at that time the most effective algorithm for...

Trying to reproduce Heap's algorithm, for generating all possible permutations of an array of integers, but I can't solve it for other integers than three. Heap's algorithm from Wikipedia: proced...