Types: N: int, X: List[int], L: List[int]
Ranges: 1 ≤ N ≤ 100,000, 0 ≤ X[i] ≤ 10^9 (1 ≤ i ≤ N), 1 ≤ L[i] ≤ 10^9 (1 ≤ i ≤ N)
Addtl Info: If i ≠ j, X[i] ≠ X[j]