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Problem 1001
1001
2021ss
| 2015-05-23 16:20:44
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题目到底什么意思啊? 123->213->123->213?
2021ss
| 2015-05-23 16:21:44
# 1
N=3时,12互换。RT
1412180203
| 2015-05-23 18:02:49
# 2
楼主,时间超限你怎么解决的?
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