--- title: "luna (@maymeow) | Hashnode" description: "nothing to see here. Read the latest articles by luna on Hashnode." url: "https://hashnode.com/@maymeow" --- @maymeow # luna @maymeow · The World · Joined April 2022 nothing to see here ### [generating technical usernames](https://maymeow.hashnode.dev/generating-technical-usernames?utm_source=hashnode&utm_medium=feed) For technical username you can use for example a prefix u + 10 random numbers. PowerShell one-liner: 'u' + -join (1..10 | ForEach-Object { Get-Random -Minimum 0 -Maximum 10 }) Output examples: u48291 1 min read · [maymeow.hashnode.dev](https://maymeow.hashnode.dev/generating-technical-usernames?utm_source=hashnode&utm_medium=feed) [Sep 10](https://hashnode.com/posts/generating-technical-usernames/6aa25081ce96ba62757f0fe9) ### [AoC25 Day 12: Christmas Tree Farm](https://maymeow.hashnode.dev/aoc25-day-12-christmas-tree-farm?utm_source=hashnode&utm_medium=feed) Tetris, but make it elves. Today was all about figuring out whether oddly shaped presents could tile a given rectangle without overlaps. On paper it sounds like a straight polyomino packing question; in practice it turned into a tour through three di... 7 min read · [maymeow.hashnode.dev](https://maymeow.hashnode.dev/aoc25-day-12-christmas-tree-farm?utm_source=hashnode&utm_medium=feed) [Dec 12, 2025](https://hashnode.com/posts/aoc25-day-12-christmas-tree-farm/693c0c4eed77d13aeb635a6a) ### [AoC25 Day 11: Reactor Relays](https://maymeow.hashnode.dev/aoc25-day-11-reactor-relays?utm_source=hashnode&utm_medium=feed) Today’s problem looked like a straight "count the wire paths" exercise, but the density of the wiring diagram quickly turned it into a combinatorics workout. I ended up treating the factory like a directed acyclic graph of devices and tallying every ... 6 min read · [maymeow.hashnode.dev](https://maymeow.hashnode.dev/aoc25-day-11-reactor-relays?utm_source=hashnode&utm_medium=feed) [Dec 12, 2025](https://hashnode.com/posts/aoc25-day-11-reactor-relays/693c0b8da2e70af9e097a31d) ### [AoC25 Day 10: Factory](https://maymeow.hashnode.dev/aoc25-day-10-factory?utm_source=hashnode&utm_medium=feed) Today’s puzzle felt like fixing two halves of the same machine: first we snap indicator lights into place with toggles, then we flip a lever and treat those same buttons like little add-one circuits. Two different algebra problems, one pile of schema... 8 min read · [maymeow.hashnode.dev](https://maymeow.hashnode.dev/aoc25-day-10-factory?utm_source=hashnode&utm_medium=feed) [Dec 12, 2025](https://hashnode.com/posts/aoc25-day-10-factory/693c069588ce7abd9ff2b423) ### [AoC25 Day 9: Movie Theater](https://maymeow.hashnode.dev/aoc25-day-9-movie-theater?utm_source=hashnode&utm_medium=feed) North Pole interior decorators handed me a loop of red tiles laid out on a huge floor. Part 1 wanted the largest axis-aligned rectangle that uses any two red tiles as opposite corners. Part 2 limited the rectangle to stay entirely inside the red/gree... 8 min read · [maymeow.hashnode.dev](https://maymeow.hashnode.dev/aoc25-day-9-movie-theater?utm_source=hashnode&utm_medium=feed) [Dec 9, 2025](https://hashnode.com/posts/aoc25-day-9-movie-theater/69388be2d71b8b0ccfd1e76e)