UVA1451 平均值 Average

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=447&page=show_problem&problem=4197 [PDF](https://uva.onlinejudge.org/external/14/p1451.pdf)

Input Format

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Output Format

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