Battleships in a Board

Intuition

Solution

class Solution:
    def countBattleships(self, board: List[List[str]]) -> int:
        if len(board) == 0:
            return 0

        count = 0
        for i in range(len(board)):
            for j in range(len(board[0])):
                if board[i][j] == '.':
                    continue
                if i > 0 and board[i-1][j] == 'X':
                    continue
                if j > 0 and board[i][j-1] == 'X':
                    continue
                count += 1
        return count