Hi everyone, I wanted to share the Happy Hackers Programming Challenge that I organized on DMOJ a couple of months ago. Although the contest has already taken place, it's still a valuable resource for those looking to practice. The contest features six problems, graded from CCC Senior to CCO level, designed to progressively increase in difficulty. These were collaboratively tested by students from Carnegie Mellon, Cambridge, and UWaterloo. While the contest has passed, the problems remain a great way to sharpen your skills, especially the fifth problem, which I find particularly interesting. Here's the link to the contest page: Happy Hackers Programming Challenge I.

Also, I'm currently preparing for the Happy Hackers Programming Challenge II, expected to be out this summer. Feel free to check out the previous contest and stay tuned for the upcoming one!