Hacker News: yuchen20https://news.ycombinator.com/user?id=yuchen20Hacker News RSShttps://hnrss.org/hnrss v2.1.1Fri, 24 Jul 2026 02:09:31 +0000<![CDATA[New comment by yuchen20 in "AWS: Inaccurate Estimated Billing Data – $1.7 billion"]]>I got 3 consecutive emails warning that my budget crossed its $18 threshold. Opened it up: cost was 78 million. Thought it was a phishing attempt, logged into my actual account, and... still 78 million. EMOTIONAL DAMAGE.

]]>Fri, 17 Jul 2026 11:07:33 +0000https://news.ycombinator.com/item?id=48945856yuchen20https://news.ycombinator.com/item?id=48945856https://news.ycombinator.com/item?id=48945856<![CDATA[New comment by yuchen20 in "Code Golfing ARC-AGI with an Evolutionary Agent"]]>Built an evolutionary code golf agent for Kaggle's NeurIPS 2025 Google Code Golf Championship. Solves ARC-AGI puzzles and compresses solutions to the fewest bytes through: - Extensive prompt engineering - An evolutionary database enabling cross-task crossover to escape local minima - Hand-crafted templates to teach the LLM large refactoring tricks Sharing what worked, what failed, and lessons for LLMs in program synthesis.

]]>Thu, 06 Nov 2025 21:54:59 +0000https://news.ycombinator.com/item?id=45840945yuchen20https://news.ycombinator.com/item?id=45840945https://news.ycombinator.com/item?id=45840945<![CDATA[Code Golfing ARC-AGI with an Evolutionary Agent]]>Article URL: https://yuchen-mao.vercel.app/blog/google-code-golf

Comments URL: https://news.ycombinator.com/item?id=45840944

Points: 2

# Comments: 1

]]>Thu, 06 Nov 2025 21:54:59 +0000https://yuchen-mao.vercel.app/blog/google-code-golfyuchen20https://news.ycombinator.com/item?id=45840944https://news.ycombinator.com/item?id=45840944