Types: N: int, x: List[List[int]], y: List[List[int]]
Ranges: 2 ≤ N ≤ 10^5, 0 ≤ x[i][j], y[i][j] ≤ 100
Addtl Info: (x[i][0], y[i][0]) ≠ (x[i][1], y[i][1])