Types: m: int, n: int, candidate_locations: List[Tuple[int, int]], existing_stores: List[Tuple[int, int]]
Ranges: 1 ≤ m, n ≤ 50, (1 ≤ x ≤ m, 1 ≤ y ≤ n) for all candidate_locations and existing_stores
Addtl Info: None