<br />
<b>Warning</b>:  session_start(): open(/tmp/sess_71184056e048e9d97b3bed4ad3fcffc6, O_RDWR) failed: No space left on device (28) in <b>/data/wiki/inc/init.php</b> on line <b>239</b><br />
<br />
<b>Warning</b>:  session_start(): Failed to read session data: files (path: ) in <b>/data/wiki/inc/init.php</b> on line <b>239</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /data/wiki/inc/init.php:239) in <b>/data/wiki/inc/auth.php</b> on line <b>430</b><br />
<div class="error">Writing /data/wiki/data/cache/6/6a0f3843c5ea426c08feea4e44f84973.captchaip failed</div><br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /data/wiki/inc/init.php:239) in <b>/data/wiki/inc/Action/Export.php</b> on line <b>103</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /data/wiki/inc/init.php:239) in <b>/data/wiki/inc/Action/Export.php</b> on line <b>103</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /data/wiki/inc/init.php:239) in <b>/data/wiki/inc/Action/Export.php</b> on line <b>103</b><br />
======2023 牛客暑期多校训练营 2======

=====Replay (by arimx)=====

====12:00-12:25 | E====

lprdsb 发现可以分长度二分答案。

====12:25-12:41 | K====

samnever 完成。我发现 I 才是真签到题，在 samnever 查错其间开始写。

====12:41-12:48 | I====

然而还是少考虑了一些，本来以为 5 min 能写完的签到题前后写了 15 min，好在检查比较谨慎没有罚时。

====12:48-13:29 | F====

其间一度卡住。特别大胆地猜了结论，发现确实是对的。

====13:29-14:52 | H====

注意到区间可加，于是写了个 st 表。由于生疏写了特别久，还有一发罚时。

====14:52-15:21 | G====

lprdsb 写了个马拉车，又是我不会的东西，% 一下。

====15:21-15:36 | D====

lprdsb carry，再 % 一下。

====15:36-17:00====

开始坐牢。lprdsb 写线性基来解决 A，samnever 尝试树剖来解决 B，均无果。我负责摇旗呐喊。

=====Dirt=====

====arimx====

  * 被小小 st 表所困，熟练度亟待提高。