Overview
There are 1263879 rating changes in 745 rated contests (by 2018/03/15, including those mentioned in the "Something Weird" section). The overall average of deltas is -6.30274.
Rating Changes Distribution
Top 20 Events: Positive Rating Change
Top 20 Events: Negative Rating Change
Top 10 Users: Consecutive Positive Rating Changes
# | Who | # consecutive |
---|---|---|
1 | tourist | 21 |
2 | RAD | 14 |
2 | xyz111 | 14 |
4 | KK_ndv | 13 |
4 | guoyu1098 | 13 |
6 | Matei.Chirita | 12 |
6 | Rafaelcs | 12 |
6 | vepifanov | 12 |
6 | green_frog | 12 |
6 | harshit_ag456 | 12 |
Top 10 Users: Consecutive Negative Rating Changes
# | Who | # consecutive |
---|---|---|
1 | worse | 31 |
2 | Mhammad1 | 25 |
3 | ahmed_25 | 22 |
4 | newbie314159 | 21 |
5 | NelsonMondialu | 19 |
6 | .o. | 18 |
7 | THton | 17 |
7 | Adai_is | 17 |
9 | MisterMax | 16 |
10 | ashutosh08 | 15 |
10 | erudite | 15 |
10 | cyclone_chaple | 15 |
10 | Yoyo2014 | 15 |
10 | asha_42 | 15 |
10 | Yerassyl | 15 |
Top 10 Contests: Positive Averaged Rating Change
# | Contest | Avg. Δ | # participants |
---|---|---|---|
1 | Manthan 2011 | 34.309 | 745 |
2 | Codeforces Beta Round 88 | 21.053 | 1103 |
3 | Codeforces Beta Round 81 | 20.353 | 1034 |
4 | Codeforces Beta Round 87 (Div. 1 Only) | 16.067 | 416 |
5 | Codeforces Beta Round 91 (Div. 1 Only) | 15.448 | 420 |
6 | Codeforces Beta Round 92 (Div. 1 Only) | 15.140 | 365 |
7 | Codeforces Beta Round 85 (Div. 1 Only) | 14.957 | 398 |
8 | Codeforces Beta Round 83 (Div. 1 Only) | 14.909 | 351 |
9 | Codeforces Beta Round 86 (Div. 1 Only) | 14.389 | 355 |
10 | Командная олимпиада школьников, Саратов, 2011 | 14.331 | 580 |
Top 10 Contests: Negative Averaged Rating Change
# | Contest | Avg. Δ | # participants |
---|---|---|---|
1 | VK Cup 2012 Раунд 3 (неофициальная редакция для Div. 2) | -31.142 | 643 |
2 | VK Cup 2012 Раунд 2 (неофициальная редакция для Div. 2) | -28.747 | 707 |
3 | Чемпионат КРОК 2012 - Раунд 2 (неофиц. редакция для Div. 2) | -27.681 | 627 |
4 | Codeforces Round 112 (Div. 2) | -27.462 | 1518 |
5 | Codeforces Round 113 (Div. 2) | -26.989 | 1443 |
6 | Codeforces Round 324 (Div. 2) | -20.562 | 4333 |
7 | Чемпионат КРОК 2012 - Раунд 2 | -20.151 | 338 |
8 | Codeforces Round 114 (Div. 2) | -19.963 | 1395 |
9 | Codeforces Round 326 (Div. 2) | -18.719 | 3838 |
10 | Codeforces Round 323 (Div. 2) | -18.305 | 4728 |
Rating: Sum, Average, Standard Deviation and Skewness
A user is included in the sum only after their first participation in a contest.
Note that we can observe changes of rating system (November 2011 and October 2015) on the graph.
Something Weird
- In Codeforces Round #FF (Div. 2), kasim appeared in both #1095 and #1986.
- In Codeforces Round 270, yuki2006 appeared in both #2876 and #3520; a00920 appeared in both #1097 and #3602.
- In Codeforces Round 338 (Div. 2), bohuss appeared in both #256 and #3477; InnocentFool appeared in both #555 and #3477; elgris appeared in both #884 and #3477; Altitude appeared in both #2439 and #3477; mohamedazab appeared in both #2831 and #3477. (Such a buggy round?)
- In MemSQL Start[c]UP 2.0 - Round 2, FreezingCool had a rating change of +5, but it wasn't displayed on the user page. (Can somebody explain why max rating is smaller than contest rating?)
- In Технокубок 2018 - Отборочный Раунд 4, Roma_Pussy had a rating change of -83. However, it seems that the rating is not actually changed. After that, his ratings displayed on "contest rating" and "rating change" in contest pages was 83 higher than those on the user history graph.
- In contest pages, ratings less than 100 are displayed as 100. 5 users have been affected: worse, MisterMax, newbie314159, errorerror, and Mhammad1.