多少块土地 How Many Pieces of Land ?

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=14&page=show_problem&problem=1154 [PDF](https://uva.onlinejudge.org/external/102/p10213.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10213/82410c5d60b6479b7a08f094e449cc42577c84fa.png)

输入输出格式

输入格式


![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10213/12cbe469542e974964720e963806931c43bb097f.png)

输出格式


![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10213/36cbbf8a0535026ec0f15834fa670c7e8256bd64.png)

输入输出样例

输入样例 #1

4
1
2
3
4

输出样例 #1

1
2
4
8