On and off for most of 2025, I tried solving the challenges on highload.fun. I did relatively well, and was #1 on the leaderboard for a couple months before a new challenge was introduced and Yuriy caught up. I didn’t do too well on this task (Liquidation Engine) and remained second by the time the leaderboard wrapped up at the end of the year
Here’s a collection of most of the things I learnt and my approach to all of the problems.
For the source code of my repo, which includes all input generators and a testing harness, see openload