isNonCrossing -- whether 2 subsets are non-crossing

• Usage:

  isNonCrossing(A, B)

• Inputs:
  • A, a list,
  • B, a list,
• Outputs:
  • a Boolean value, whether A and B are non-crossing subsets of [n]

i1 : isNonCrossing({0,1,7},{2,4,5})

o1 = true

i2 : isNonCrossing({2,3,6},{1,4})

o2 = false