Base -2

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=23&page=show_problem&problem=2062 [PDF](https://uva.onlinejudge.org/external/111/p11121.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11121/fa7bc9d210580e6415e9107212fb15b89e8de60a.png)

输入输出格式

输入格式


![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11121/3aa143710fe378425d127ae13ec64d3203ae1bab.png)

输出格式


![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11121/ad638c7f7cb8c6e5d2e5f18c771d0a308f6bd915.png)

输入输出样例

输入样例 #1

4
1
7
-2
0

输出样例 #1

Case #1: 1
Case #2: 11011
Case #3: 10
Case #4: 0