MIKE, ban BOTS, please!
Difference between en37 and en38, changed 636 character(s)
(Bad English, so I used AI.)↵
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I know there are other posts about this. I listed some bots here. I'm also wondering why some of these accounts were not banned earlier.↵
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**Bots with a UUID in their code.**↵
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[user:wtehjnyu426,2025-11-17] [user:nxaadm9648,2025-11-17] [user:zwatti772,2025-11-17] [user:aqkwgw19463,2025-11-17] [user:dftvmz000,2025-11-17] [user:kxwzyd795,2025-11-17] [user:rbaglkv2489,2025-11-17] [user:ndxxau86464,2025-11-17] [user:ohfwwv873,2025-11-17] [user:tujjmglhyu41495,2025-11-17] [user:hkebxfxb9714,2025-11-17] [user:cexfkoe511,2025-11-17] [user:zsphrmp855,2025-11-17] [user:xeyjmne82169,2025-11-17] [user:jpzqgrs59098,2025-11-17] [user:jttrfprg748,2025-11-17]↵
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**Bots appear to be from the same LLM.**↵
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They have random names(the name length is always 10), an empty first line in their code, and they attempt problems sequentially by contest ID (e.g., one attempted IDs 835–909). **Most importantly, these bots submit many problems at once.**↵
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**Since these accounts are registered and abandoned within hours, I think additional registration verification is needed.**↵
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[user:ipau8609d3,2025-11-19] [user:9oxie5g474,2025-11-19] [user:9oxie5g474,2025-11-19] [user:agxs5cgp,2025-11-19] [user:w4ac5862jt,2025-11-19] [user:d83f0gw083,2025-11-19] [user:wa2rgtn9g6,2025-11-19] [user:2xwmxvegk9,2025-11-19] [user:x1sae0mm1r,2025-11-19]↵
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**Smarter bots, can only be identified with AI comments.**↵
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[user:6oo9m2q9ly,2025-11-19] [user:cnfnkhte7h,2025-11-19] [user:hgds9m4s67,2025-11-19] [user:mnhsri975,2025-11-19] [user:aefnvo7863,2025-11-19] [user:fqoijwp715,2025-11-19] [user:bfsbitu5136,2025-11-19] [user:paegcfltt2424,2025-11-19] [user:kntzqjnpts0688,2025-11-19] [user:mpvfmavm51762,2025-11-19] [user:doooxwbg6759,2025-11-19] [user:jdkutcidal3299,2025-11-19] [user:ccvqfotgdc353,2025-11-19] [user:wetogec7678,2025-11-19] [user:xquqbn735,2025-11-19] [user:ynnpmulbi657,2025-11-19] [user:tcjsib213,2025-11-19] [user:d2cgpl6bc7,2025-11-19] [user:du6n03j0lygpiomvultc76426,2025-11-20] [user:ffgueax43597,2025-11-20] [user:mnmpwi1916,2025-11-20] [user:vtfbhzja504,2025-11-1920] [user:oe5gml9472lzyvrql84391,2025-11-20] [user:vkttdqsp115,2025-11-1920]↵
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**Maybe bots, but "Recently, your account was used to crawl." so I can't look at submissions.**↵
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These accounts also tend to use "PyPy 3, Go, JavaScript, Kotlin 2.2."↵
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[user:gpiomvultc76426,2025-11-20] [user:ffgueax43597,2025-11-20] [user:mnmpwi1916,2025-11-20] [user:vtfbhzja504,2025-11-20] [user:olzyvrql84391,2025-11-20] [user:vkttdqsp115,2025-11-20]↵
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Each time I update this post, I find new bot accounts. =(Each time I update this post, I find new bot accounts. UPD: It seems no bot now.↵
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Maybe I should @[user:MikeMirzayanov,2025-11-19]?↵
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UPD2: Merged [user:CarrotPlane,2025-11-19]'s comment.↵
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UPD4: Merged bots [here](https://mirror.codeforces.com/blog/entry/148498).↵
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UPD5: Merged bots [here](https://mirror.codeforces.com/blog/entry/148454).↵
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UPD9: Merged bots [here](https://mirror.codeforces.com/blog/entry/148549)↵
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UPD1&3&6&7&8&10&11&12&13:Removed banned bots(ban 100+ now :), but still remain some here...).

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en40 English 123asdf123 2025-11-20 12:53:00 87
en39 English 123asdf123 2025-11-20 11:46:28 112
en38 English 123asdf123 2025-11-20 11:36:33 636 Tiny change: '8&10&11&12:Removed b' -> '8&10&11&12&13:Removed b'
en37 English 123asdf123 2025-11-20 11:31:36 187
en36 English 123asdf123 2025-11-20 11:27:47 645 banning!
en35 English 123asdf123 2025-11-20 11:17:03 8134 fix grammar and update
en34 English 123asdf123 2025-11-20 10:41:49 280 fix grammar
en33 English 123asdf123 2025-11-20 10:26:47 215
en32 English 123asdf123 2025-11-20 10:21:35 1199
en31 English 123asdf123 2025-11-20 09:59:22 7 fixed
en30 English 123asdf123 2025-11-20 09:58:55 331
en29 English 123asdf123 2025-11-20 09:49:03 526
en28 English 123asdf123 2025-11-19 16:38:16 234
en27 English 123asdf123 2025-11-19 16:32:22 609
en26 English 123asdf123 2025-11-19 15:56:09 1 Tiny change: ' 835–909).**The most' -> ' 835–909). **The most'
en25 English 123asdf123 2025-11-19 15:54:16 310
en24 English 123asdf123 2025-11-19 15:03:05 828
en23 English 123asdf123 2025-11-19 13:51:44 96 Fix OCR problem
en22 English 123asdf123 2025-11-19 13:48:52 2 Tiny change: ']\n\n---\n**Maybe ' -> ']\n\n---\n\n**Maybe '
en21 English 123asdf123 2025-11-19 13:47:52 691
en20 English 123asdf123 2025-11-19 11:50:14 145
en19 English 123asdf123 2025-11-19 10:42:59 331
en18 English 123asdf123 2025-11-19 10:29:11 71
en17 English 123asdf123 2025-11-19 10:23:52 430
en16 English 123asdf123 2025-11-19 10:05:09 88
en15 English 123asdf123 2025-11-19 09:55:05 322 Tiny change: 'from same person(random na' -> 'from same LLM(random na'
en14 English 123asdf123 2025-11-19 09:46:20 7 Tiny change: 'bots(only 7 of them' -> 'bots(only banned 7 of them'
en13 English 123asdf123 2025-11-19 09:45:57 196
en12 English 123asdf123 2025-11-19 09:43:04 493
en11 English 123asdf123 2025-11-19 06:10:58 439
en10 English 123asdf123 2025-11-19 05:53:32 58 Tiny change: '025-11-19]\n\n**Sma' -> '025-11-19] [user:w4ac5862jt] [user:d83f0gw083]\n\n**Sma'
en9 English 123asdf123 2025-11-19 05:46:50 317
en8 English 123asdf123 2025-11-19 05:36:07 58 Wrong sort again =(
en7 English 123asdf123 2025-11-19 05:33:33 58
en6 English 123asdf123 2025-11-19 05:32:05 515
en5 English 123asdf123 2025-11-19 05:25:57 593 Not Tiny change: '11-17]\n\n**Seem' -> '11-17]\n\n "Last visit" is 9/29 Hours ago.\n\n**Seem'
en4 English 123asdf123 2025-11-17 16:59:38 212
en3 English 123asdf123 2025-11-17 16:53:13 122
en2 English 123asdf123 2025-11-17 16:49:05 88
en1 English 123asdf123 2025-11-17 16:44:50 531 Initial revision (published)