UVA1621 跳来跳去 Jumping Around
Background
# 本题 UVA 疑似没有 SPJ，请慎重提交。
Description
[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=825&page=show_problem&problem=4496
[PDF](https://uva.onlinejudge.org/external/16/p1621.pdf)
Input Format
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Output Format
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