将初始状态和目标状态的木块上的数字按行优先顺序写下来变成两个整数序列。

Write down the numbers on the tiles in both the starting and goal states (0 for the missing tile) in row-major order to form two sequences of integers.

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然后在ORDERS表中查找这些订单键，确定行项目所属订单的优先级。

Those order keys are looked up in the ORDERS table to determine the priority of the order that the line item belongs to.

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该作业计算在最近 6 个月的时间里，一般或高优先级订单中通过邮寄或海运发货的行项目的数量，并将这些数量按订单优先级排序。

The job counts the number of line items shipped by mail or sea within the last six months that are part of normal or high-priority orders, and breaks the counts down by order priority.

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