isNonCrossing(A, B)
This function determines whether two disjoint subsets of [n] are non-crossing.
i1 : isNonCrossing({0,1,7},{2,4,5}) o1 = true
i2 : isNonCrossing({2,3,6},{1,4}) o2 = false
The object isNonCrossing is a method function.