Shayan | International Grandmaster on Codeforces

Is there any Codeforces for SWE contests or should we build it?

@repovive Glad that finally a Premier round is gonna be back up!

Get ready for the next premier round! 🏆 Repovive Premier Round 3 📅 Sunday, 3 May 2026 | 14:35 UTC ⏳ Duration: 2 hours, 30 minutes 🔗 Register here: repovive.com/contests/6 📖 CF Blog & Details: codeforces.com/blog/entry/153…

In DFS, which convention do you use for naming the current node and its neighbor?

@_AmShZ_ Uh, miss this so much

Cooking...

@HamzaHassanain0 Yeah I think that's irresistible lol

@ShayanCJahan And risk not exposing AI generated content 🤣😭 ?

Every day that passes, I think more about why no one builds simple wrapper over LLMs and makes sure it never uses em dashes, “master,” and “deep dive”. It’s super simple, and I would personally buy that. I’m really sick of this shit.

@_AmShZ_ It’s great to see we’re getting better

After running five contests, we just had our first truly flawless one. Hosting it on Repovive and seeing our own brand take shape gave me an incredible sense of satisfaction.

Which algorithm felt useless at first, but became one of your favorites later?

@_AmShZ_ Centroid Decomposition. Like why should you remove a vertex so that every component is ... lol

I just realized when you have a todo list for today, you either do it all today or it bites the dust. There is no I’ll do the rest tomorrow. Tomorrow has its own already.

@tavaqueue That’s crazy inspiring man

I made $25K in a month with a pressure washer at 18. No connections. Never used a pressure washer before. Started with $20. Simply knocked on doors until someone said yes. That's still my entire business strategy. The doors are just digital now. repovive.com

The contest ran smoothly, and the problems seemed well-balanced. Thanks everyone for participating!

Something I taught 14 yo: Most progress is a mix of steps forward and steps back, just with with more of the former. But you can get a run of steps back. So to judge progress accurately you need to use a big enough window, or it could look like you're failing.

We are back! Get ready for the next round. 🏆 Repovive Standard Round 2 📅 Sunday, 19 April 2026 | 13:35 UTC ⏳ Duration: 2 hours 🔗 Register here: repovive.com/contests/5 📖 CF Blog & Details: codeforces.com/blog/entry/153…

@_AmShZ_ Man I didn't know this.

A fast way to toggle a character's case (upper/lower): XORing with space; 'a' ^ ' ' = 'A'

A fast way to check if a number is a power of 2: n & (n - 1) == 0

Having a startup is hard, and it takes time to learn its different aspects. Cold emailing was one of the hardest challenges, but like everything else, you learn your way after a while.

@_AmShZ_ What a day it was🔥❤️

Met Shayan at ICPC 2024! He came from the University of Maryland, and I from Sharif University of Technology. After years, we finally met again. He got us this as a souvenir! @ShayanCJahan

@Jashanx_gill Are they?

Why is everyone making a shift from Claude to Codex?