1. I created this list on 2026/04/30, and retrospective inclusion of problems (that were solved by me in the past) will obviously select for different things relative to the problems I solve hereafter. 
2. I must also stress that this list isn't ordered by any metric (including solve date or quality).
3. As a matter of principle, this list will not contain any problem that I didn't solve unassisted.


| Problem | Comments |
|:-------|:-----:|
| https://codeforces.com/contest/1458/problem/F | A couple of nice observations around diameters |
| https://codeforces.com/contest/1583/problem/G | Cute |
| https://codeforces.com/problemset/problem/2128/F | Just beautiful | 
| https://codeforces.com/contest/2068/problem/E | Surprisingly good for an ICPC problem |
| https://codeforces.com/problemset/problem/1810/G | One of the problems of all time (?) |
| https://codeforces.com/contest/1548/problem/E | Working memory test | 
| https://codeforces.com/contest/2021/problem/E3 | A lot of little subproblems |
| https://codeforces.com/contest/1973/problem/F | Memorable to me because my solution for this was hilariously contrived |
| https://codeforces.com/contest/2164/problem/F2 | Beautiful, I was stuck on this for a while | 
| https://codeforces.com/contest/1981/problem/E | Easy but I like how trivial it becomes with a certain geometric visualization |
| https://codeforces.com/contest/1562/problem/F | Nice |
| https://codeforces.com/contest/1710/problem/D | I distinctly remember solving this (I was extremely depressed for a few weeks while at home, and this problem made me quite happy for a while) |
| https://codeforces.com/problemset/problem/1819/E | I was really depressed when I solved this too. I don't think this problem is as hard as its rating implies. | 
| https://codeforces.com/contest/1827/problem/E | I'm a sucker for small-to-large merging. Also, I was quite weak when I solved this. | 
| https://codeforces.com/contest/2147/problem/F | Elegant | 
| https://codeforces.com/problemset/problem/1654/F | There's an extraordinarily elegant solution, and there's an extraordinarily inelegant solution |
| https://codeforces.com/contest/1062/problem/F | I solved this a long time ago and remember being shocked when I realized the solution |
| https://codeforces.com/contest/2228/problem/E1 | Cute interleaving argument |
| https://codeforces.com/contest/1975/problem/F | Surprising solution | 
| https://codeforces.com/contest/1430/problem/G | Cute |
| https://codeforces.com/contest/1408/problem/G | I have no shame, I must put this here... |