def f(nums, x, y): count = 1 queue = [[x, y]] visited = [[x, y]] d = [[-2, -1], [-2, 1], [-1, -2], [-1, 2], [1, -2], [1, 2], [2, -1], [2, 1]] n, m = len(nums), len(nums[0]) while queue: x, y = queue.pop() for dx, dy in d: x1, y1 = x + dx, y + dy ...