Can anyone explain this question to me? http://acm.hdu.edu.cn/showproblem.php?pid=4253
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| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en2 |
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hereicomewf | 2015-08-16 19:17:31 | 21 | ||
| en1 |
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hereicomewf | 2015-08-16 18:43:26 | 108 | Initial revision (published) |
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