It was 1 AM. I was just meaninglessly scrolling down my X (formerly Twitter) timeline before I go to sleep... and I came accross to this puzzle from Jazzy. At first, I thought it won't be hard to solve this (spoiler: it was not), and I was just like, "This would take about 3 hours, so let's solve this and go to sleep" (it was 1 AM at that time, and well, lately I slept at 4~6 PM). However it turned out this puzzle is much harder than first look, and it kept me awake until 11 AM until I finally solved this puzzle. Yeah, I spent 10 hours for solving this puzzle (though this includes the time for doing KYC to purchase ETH from an exchange, creating ENS domain since I didn't have it and I wanted to have my name on the leaderboard rather than random hex characters, and so on...). Following is the writeup I wrote for this puzzle. Writeup The first look

Recently, I, Jinseo Kim, participated in SECCON CTF 2023 Finals, as the team "HK Guesser"! We placed 5th with 2206 points in the international division. HK Guesser is the variant team name of Super Guesser. For SECCON 2023, we consisted of: diff (Changwan Park) okas832 (Minyeop Choi) Pencake (Jinseo Kim) -- It's me! hk (Harsh Khuha)