UVA10120 Gift?!

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=13&page=show_problem&problem=1061 [PDF](https://uva.onlinejudge.org/external/101/p10120.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10120/cb21f10b38c0ec1116325565c2b59dc18f075ba0.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10120/0a991da8bab5aada7601c3c48bed906bdb8afee7.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10120/9f696737cffb326660208952c584485296b63d14.png)