Types: n: int, m: int, k: int, x: List[int], y: List[int]  
Ranges: 1 ≤ n, m ≤ 5 × 10^4, 1 ≤ k ≤ min(10^5, n × m), 0 ≤ xi ≤ n−1, 0 ≤ yi ≤ m−1  
Addtl Info: The given coordinates (xi, yi) are all different.