Hello Codeforces !

I am a contestant participating in IOI 2026 in team Canada. I have documented my experience throughout the trip on my phone and put it together in a YouTube video. I have started a new YouTube channel for this and it will be an open door to YouTube content creation for me.

Here is a link to the video:

https://www.youtube.com/watch?v=As-7cc_JkJk

I welcome any comment on what went well and what I can improve on. I am highly likely to participate IOI against in 2027 in Germany, so I can make a second one there!

Hi all, if my performance in a contest is equivalent to the skill of x elo and my actually elo is y, what formula is used to update my elo?