In: Advanced Math
[Discrete math]
Show that it is possible to arrange the numbers 1, 2, . . . , n
in a row so that the average of any two of these numbers
never appears between them. [Hint: Show that it suffices
to prove this fact when n is a power of 2. Then use mathematical
induction to prove the result when n is a power
of 2.]
I saw the solution but I don't understand why permutation pi is using here.. please explain it with more detail.