当你从1开始连续的累加数值，累加奇数个，其结果等于中位数与最后一个数的积。
When you add consecutive Numbers starting with 1, and the number of Numbers you add is odd, the result is equal to the product of the middle number among them times the last number.
当你从1开始连续的累加数值，累加奇数个，其结果等于中位数与最后一个数的积。
When you add consecutive Numbers starting with 1, and the number of Numbers you add is odd, the result is equal to the product of the middle number among them times the last number.
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