Today a horrible thing almost happened: I barely stayed an International Grandmaster on Codeforces after participation in CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!). I would't say I was exceptionally slow or that I solved problems too clumsily, but for some reason the majority of participants near my level were faster than me on these problems.
I recorded a five hour long video about my adventures. If you're interested in a particular problem, follow the timecodes:
| Problem | Solving | Implementation | Editorial |
|---|---|---|---|
| 1870A - MEXanized Array | 01:37 | 02:45 | 3:23:28 |
| 1870B - Friendly Arrays | 06:23 | 10:54 | 3:30:20 |
| 1870C - Colorful Table | 12:48 | 14:12 | 3:41:00 |
| 1870D - Prefix Purchase | 22:14 | 24:41 | 3:58:20 |
| 1870E - Another MEX Problem | 39:37 | 58:42 | 4:34:24 |
| 1870F - Lazy Numbers | 1:31:03 | 2:54:32 | 2:30:37 |
If you open a video and see it's low quality, you might want to wait several minutes until YouTube processes the higher resolutions.
UPD. This is high quality now. Please watch!
