| # | User | Rating |
|---|---|---|
| 1 | jiangly | 3845 |
| 2 | tourist | 3798 |
| 3 | orzdevinwang | 3706 |
| 4 | jqdai0815 | 3682 |
| 5 | ksun48 | 3589 |
| 6 | Ormlis | 3532 |
| 7 | Benq | 3468 |
| 8 | Radewoosh | 3463 |
| 9 | ecnerwala | 3451 |
| 10 | Um_nik | 3450 |
| # | User | Contrib. |
|---|---|---|
| 1 | cry | 165 |
| 2 | Qingyu | 159 |
| 2 | -is-this-fft- | 159 |
| 4 | atcoder_official | 157 |
| 5 | Dominater069 | 156 |
| 6 | adamant | 154 |
| 7 | djm03178 | 151 |
| 8 | luogu_official | 150 |
| 9 | awoo | 148 |
| 10 | maomao90 | 145 |
Using the Codeforces API, I downloaded data for the entire Codeforces problem set. I plotted the average problem rating of Codeforces Rounds over time: 
Interestingly, it seems like Division 4 problems are converging with those of Division 3. At this rate, Division 4 will be as difficult as Division 1 by the year 2058 or by Round 3284!
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