Aaeria's blog

The biggest rating change
By Aaeria, 22 months ago, In English

So the other day I saw this funny video:

cat

Anyways, that made me wonder, what is the highest drop in rating on codeforce? And after checking thousands of contest results, here's what I found:

change contest user
-302 1081 wxh010910
-303 1696 popaj
-306 1552 cscse
-307 1033 vintage_Vlad_Makeev
-309 1553 PrincessConsuela
-310 1615 pmt2018
-312 1654 Allvik06
-313 1654 csyakuoi
-314 1450 Mediocrity
-316 1523 yuzhechuan
-317 UtopianZ 1779
-317 cfabcdhhhh 1770
-319 1552 C137
-319 1055 Arterm
-322 1523 Roundgod
-323 1696 rainboy
-325 1608 realFZzzz
-327 1656 300iq
-333 1704 dfgzm
-334 1608 WeakestTopology
-336 768 yosupo
-351 1615 delta_X
-352 1621 AriaH
-356 1585 Wailydest
-373 1097 izban
-382 1774 Tlatoani
-389 1148 kiwikiwi
-417 1696 AutumnKite

As you can see, the biggest drop is -389 rating. While impressive, this is far from optimal, since they didn't get last in the contest. Maybe some blackred can take one for the team and get an even higher score.

Update: someone else got last place and dropped by -417 :O However, they could have dropped more if they were patient and got a higher rating first (smh).

Btw, here are the smallest drops on codeforces. Some of these might be unfair because of the boost you get in your first contests, however with the api there is no easy way to tell.

change contest user
+803 814 Mhammad1
811 1771 apei
+827 1284 Brookli
+837 1691 Remakee
+849 1534 dreaming_away
+854 1610 he_____hezhou
+858 1543 nicalvarez
+861 1417 poorboy
+865 1257 A_Fan_of_the_AK_King--lk
+874 1509 wannahavealife
+1012 1352 yet_another_ATS
+1067 1355 Rvbbish12345
+1071 1360 Droping_points
+1164 1119 vammadur
+1182 1307 140870
+3223 next round people who liked this blog
  • Vote: I like it
  • +611
  • Vote: I do not like it

Comments Comments (21)
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22 months ago, # |
  Vote: I like it +15 Vote: I do not like it

Probably it should be highest gains instead of smallest drops?

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    22 months ago, # ^ |
      Vote: I like it +15 Vote: I do not like it

    smallest drop is factual.

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      22 months ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      Oh look! 140870 dropped by -1182 points...

      It may be factual but it isn't appropriate.

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22 months ago, # |
  Vote: I like it +8 Vote: I do not like it

I love the positivity in the last line!

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22 months ago, # |
  Vote: I like it +27 Vote: I do not like it

Please share the link to the cat video. Thanks.

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22 months ago, # |
  Vote: I like it +2 Vote: I do not like it

ᓚᘏᗢ cat ᓚᘏᗢ

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22 months ago, # |
  Vote: I like it +8 Vote: I do not like it

CGR21 refreshed the record.

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    22 months ago, # ^ |
      Vote: I like it +8 Vote: I do not like it

    he actually included two of the rating drops from that contest in the table (rainboy and popaj) but idk how he missed the highest rating drop ever: -417 delta for AutumnKite in that very same contest!

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      22 months ago, # ^ |
      ← Rev. 2   Vote: I like it 0 Vote: I do not like it

      :o

      it seems like their submissions got skipped, this probably happened some time after the contest ended

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22 months ago, # |
  Vote: I like it -9 Vote: I do not like it

One question : How did you manage to find out those biggest rating changes? Did you manually searched or did you use some sort of automated scripts to find out it.

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    22 months ago, # ^ |
      Vote: I like it -9 Vote: I do not like it

    IDK why is this comment even downvoted, i was just curious to know about how did he scrape the data. It was a geniune question

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      22 months ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      You're getting downvoted because it's point-blank obvious Aaeria manually searched through every rated contest.

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    22 months ago, # ^ |
    ← Rev. 2   Vote: I like it +10 Vote: I do not like it

    I actually just had my minions check for me

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22 months ago, # |
← Rev. 2   Vote: I like it +8 Vote: I do not like it

https://codeforces.com/profile/epsilon_cube

+1009 but first contest

https://codeforces.com/profile/yanzhuozly

+996 but first contest

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22 months ago, # |
  Vote: I like it +5 Vote: I do not like it

Who's next?Looking for PinkieRabbit's performance!(maybe in both of two lists)

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22 months ago, # |
← Rev. 2   Vote: I like it +11 Vote: I do not like it
I was writing this out but...

I just noticed that you included rainboy and popaj in your table for biggest rating drops, from the CGR21 Codeforces Global Round 21, how did you miss AutumnKite?

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4 months ago, # |
  Vote: I like it +114 Vote: I do not like it

now zh0ukangyang has the biggest drop

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4 months ago, # |
  Vote: I like it 0 Vote: I do not like it

VivaciousAubergine had -500.

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4 months ago, # |
← Rev. 2   Vote: I like it +25 Vote: I do not like it

zh0ukangyang had got -3321

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