UVA10928 My Dear Neighbours

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=21&page=show_problem&problem=1869 [PDF](https://uva.onlinejudge.org/external/109/p10928.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10928/bf6fa0c5283e876bcbb0eb33aec0807cb60bae84.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10928/12ac9edd811c2b4cff90b3611c6b78474f4a4044.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10928/30692b0b4010e4e32e793e55263026bd28545c78.png)