UVA122 树的层次遍历 Trees on the level

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=58 [PDF](https://uva.onlinejudge.org/external/1/p122.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA122/48e7a300b4328a6d2356bcc7ffb161614aeffdaf.png)

Input Format

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Output Format

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