20240611 419 - Medium - Array

419. Battleships in a Board

class Solution:
    def countBattleships(self, board: List[List[str]]) -> int:
        ans = 0
        for i, row in enumerate(board):
            for j, c in enumerate(row):
                if c == 'X' and (j == 0 or row[j - 1] != 'X') and \
                                (i == 0 or board[i - 1][j] != 'X'):
                    ans += 1
        return ans