construct/mc langford
construct/mc langford: a task in MathConstructOptimize-Envs-harbor (Harbor dataset). A Langford sequence L(2,28) is a sequence seq 0..55 of length 56 that contains exactly two copies of each integer 1..28, such that the two copies of every value v are exactly v+1 positions apart (their indices…
The task
A Langford sequence L(2,28) is a sequence seq[0..55] of length 56 that contains exactly two copies of each integer 1..28, such that the two copies of every value v are exactly v+1 positions apart (their indices differ by v+1). Example: L(2,3) = [2, 3, 1, 2, 1, 3].