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Prepare structure for day 7

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Nic
2025-12-07 15:45:47 +01:00
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README.md
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[Challenge](day06/README.md)
[Notes](day06/Notes.md)
<!--
## Day 07 – tba
## Day 07 – Laboratories
[Page](https://adventofcode.com/2025/day/7)
[Challenge](day07/README.md)
[Notes](day07/Notes.md)
<!--
## Day 08 – tba
[Page](https://adventofcode.com/2025/day/8)

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day07/README.md
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# Day 07 – Laboratories
## Part one
You thank the cephalopods for the help and exit the trash compactor, finding yourself in the familiar halls of a North Pole research wing.
Based on the large sign that says "teleporter hub", they seem to be researching teleportation; you can't help but try it for yourself and step onto the large yellow teleporter pad.
Suddenly, you find yourself in an unfamiliar room! The room has no doors; the only way out is the teleporter. Unfortunately, the teleporter seems to be leaking magic smoke.
Since this is a teleporter lab, there are lots of spare parts, manuals, and diagnostic equipment lying around. After connecting one of the diagnostic tools, it helpfully displays error code `0H-N0`, which apparently means that there's an issue with one of the tachyon manifolds.
You quickly locate a diagram of the tachyon manifold (your puzzle input). A tachyon beam __enters the manifold at the location marked `S`__; tachyon beams always move downward. Tachyon beams pass __freely through empty space (`.`)__. However, __if a tachyon beam encounters a splitter (`^`), the beam is stopped; instead, a new tachyon beam continues from the immediate left and from the immediate right of the splitter__.
*For example:*
```
.......S.......
...............
.......^.......
...............
......^.^......
...............
.....^.^.^.....
...............
....^.^...^....
...............
...^.^...^.^...
...............
..^...^.....^..
...............
.^.^.^.^.^...^.
...............
```
In this example, the incoming tachyon beam (`|`) extends downward from `S` until it reaches the first splitter:
```
.......S.......
.......|.......
.......^.......
...............
......^.^......
...............
.....^.^.^.....
...............
....^.^...^....
...............
...^.^...^.^...
...............
..^...^.....^..
...............
.^.^.^.^.^...^.
...............
```
At that point, the original beam stops, and two new beams are emitted from the splitter:
```
.......S.......
.......|.......
......|^|......
...............
......^.^......
...............
.....^.^.^.....
...............
....^.^...^....
...............
...^.^...^.^...
...............
..^...^.....^..
...............
.^.^.^.^.^...^.
...............
```
*Those beams continue downward until they reach more splitters:*
```
.......S.......
.......|.......
......|^|......
......|.|......
......^.^......
...............
.....^.^.^.....
...............
....^.^...^....
...............
...^.^...^.^...
...............
..^...^.....^..
...............
.^.^.^.^.^...^.
...............
```
*At this point, the two splitters create a total of only three tachyon beams, since they are both dumping tachyons into the same place between them:*
```
.......S.......
.......|.......
......|^|......
......|.|......
.....|^|^|.....
...............
.....^.^.^.....
...............
....^.^...^....
...............
...^.^...^.^...
...............
..^...^.....^..
...............
.^.^.^.^.^...^.
...............
```
*This process continues until all of the tachyon beams reach a splitter or exit the manifold:*
```
.......S.......
.......|.......
......|^|......
......|.|......
.....|^|^|.....
.....|.|.|.....
....|^|^|^|....
....|.|.|.|....
...|^|^|||^|...
...|.|.|||.|...
..|^|^|||^|^|..
..|.|.|||.|.|..
.|^|||^||.||^|.
.|.|||.||.||.|.
|^|^|^|^|^|||^|
|.|.|.|.|.|||.|
```
To repair the teleporter, you first need to understand the beam-splitting properties of the tachyon manifold. *In this example, a tachyon beam is split a total of 21 times.*
Analyze your manifold diagram. __How many times will the beam be split?__

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day07/go.mod Normal file
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module day07
go 1.25.5

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day07/main.go Normal file
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package main
import (
"log"
"os"
)
// readInput reads and parses the given input
func readInput(fileName string) string {
file, err := os.ReadFile(fileName)
if err != nil {
log.Fatal(err)
}
// TODO parse
return string(file)
}
// Level1 solves the riddle for the first star
func Level1() int {
return -1
}
// Level2 solves the riddle for the second star
func Level2() int {
return -1
}
func main() {
// get file name, if given, otherwise use default one
fileName := "input.txt"
if len(os.Args) > 1 {
fileName = os.Args[1]
}
// read input
input := readInput(fileName)
// TODO
_ = input
}