Very easy to understand java solution


  • 3
    F
        public int countBattleships(char[][] board) {
            int result = 0;
            for (int i = 0; i < board.length; i++) {
                for (int j = 0; j < board[0].length; j++) {
                    if (board[i][j] == 'X' &&
                            (i == 0 || board[i - 1][j] == '.') &&
                            (j == 0 || board[i][j - 1] == '.')) {
                        result++;
                    }
    
                }
            }
            return result;
        }

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