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worse @ 2016-06-10 21:26:43

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Pascal: randomize, seekeof, seekeoln, ansistring
C++: ios::sync_with_stdio(false), cin.tie(0)

使用这些特性可能导致莫名 RE。
因为要写新 OJ 了，这 OJ 不修了，大家自己注意不要用这些特性。

whatadobe @ 2017-04-14 22:52:17

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歪日，蜜汁RE了两次才看到这个= =

adminlight @ 2017-04-15 00:17:59

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ios::sync_with_stdio(false) makes libstdc++ trying to accelerate I/O with pread(2) and pwrite(2).
They're mistakenly blacklisted by HUSTOJ developers.

16140210046 @ 2017-04-19 21:41:15

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看来运气不错···都用了，也没碰到RE

15020532236 @ 2018-03-25 16:22:36

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adminlight @ 2018-04-15 14:58:08

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Due to a limitation of XDOJ source code encoding system, the source code should **only** contain ISO-8859-1 characters.
Do not use CJK characters (even in comments).

UnknownObject @ 2018-11-16 15:05:01

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where is the memset() function?

adminlight @ 2018-11-24 14:09:31

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@UnknownObject Please read the C++11 and C99 standard.

worse @ 2019-04-25 20:41:12

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Do not use <regex> since it's buggy on XDOJ and can lead to Runtime Error.

adminlight @ 2019-07-09 23:16:54

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> Due to a limitation of XDOJ source code encoding system, the source code should **only** contain ISO-8859-1 characters.
> Do not use CJK characters (even in comments).

This issue has been resolved. You can use CJK characters in source code now.

But please be advise that GCC still refuses UTF-8 characters in identifier names:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67224

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