Find max area of the continent. A continent has both land and water. Land is marked as X, water is marked as .\n\nLand and water are connected horizontally and vertically, not diagonally.\n\neg:\n. . . . .\n. . x x .\n. . . x .\n. . . . x\n\nans: 3\n\n. . . . .\nx x x . .\nx . x . .\nx x x . . \n. . . . .\n\nans:  9\n\n. . . . .\n. x x x .\n. x . x .\n. x . x .\n\nans:7\n\n![image](https://assets.leetcode.com/users/images/be09c879-7574-4b87-a479-04f8cef3b289_1633667029.7428427.png)\n\n\n\nans: 25

Find max area of the continent. A continent has both land and water. Land is marked as X, water is marked as .\n\nLand and water are connected horizontally and 