Types: 
- N: int
- A: List[int]
- B: List[int]

Ranges:
- 1 ≤ N ≤ 18
- 1 ≤ A[i], B[i] ≤ 50 (1 ≤ i ≤ N)

Addtl Info: 
- All values in input are integers.