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注意了,如果你wa很可能是这个原因!

Posted by sky_handsome at 2007-05-30 15:52:55 on Problem 3157
考虑什么时候可能出现Error!的结果
1. 既包含大写字母,又包含_
2. 以_开头或者结尾
3. 中间有连续1个以上的_出现
4. 以大写字母开头。

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