I have a friend who is rated purple on CF but only 1700 on AtC.
So how do they really map?
# | User | Rating |
---|---|---|
1 | jiangly | 3640 |
2 | Benq | 3593 |
3 | tourist | 3572 |
4 | orzdevinwang | 3561 |
5 | cnnfls_csy | 3539 |
6 | ecnerwala | 3534 |
7 | Radewoosh | 3532 |
8 | gyh20 | 3447 |
9 | Rebelz | 3409 |
10 | Geothermal | 3408 |
# | User | Contrib. |
---|---|---|
1 | maomao90 | 173 |
2 | adamant | 164 |
3 | awoo | 161 |
4 | TheScrasse | 160 |
5 | nor | 159 |
6 | maroonrk | 156 |
7 | SecondThread | 152 |
8 | pajenegod | 146 |
9 | BledDest | 144 |
10 | Um_nik | 143 |
I have a friend who is rated purple on CF but only 1700 on AtC.
So how do they really map?
Name |
---|
I'm 1500 there. But It's not good to scale I think because they have a different kind of rating system altogether. All I can say is that, it goes both ways with tourist being +600 there and me being -500.
I think the reason behind this is that in Codeforces, if two competitors with a rating difference of $$$400$$$ compete in a single contest, it is expected that one competitor is $$$10$$$ time more likely to win the contest; and with a rating difference of $$$800$$$, the ratio becomes $$$100$$$; with a rating difference of $$$1200$$$, the ratio becomes $$$1000$$$, and so on...... (it's actually not bad to think that the ratio between any master to tourist is no more than $$$13183$$$ LOL), but in Atcoder the $$$400$$$ becomes $$$600$$$, so lower-rated participants in Codeforces becomes even more lower-rated in Atcoder, while higher-rated participants in Codeforces becomes even more higher-rated in Atcoder......(the bound between is extremely high, namely $$$3169$$$ QWQ); additionally, I personally think that Atcoder choses a rating calculation method more optimistic and tends to give more importance into "good times" contests of a participant, while Codeforces is more pessimistic and and tends to give more importance into "bad times" contests of a participant. Maybe there's consideration behind this ^_^.
They use very similar model (use different constants). But slightly different topics.
P.S. Atcoder 1300
I am red here but not even yellow at atcoder.
Edit : now i am yellow
There's already a blog discussing this.
Yeah, the same blog.
[Deleted]
cool story
Have just written a blog about this — blog