29 lines
1.1 KiB
Markdown
29 lines
1.1 KiB
Markdown
# Part 1
|
|
|
|
You come across an experimental new kind of memory stored on an infinite two-dimensional grid.
|
|
|
|
Each square on the grid is allocated in a spiral pattern starting at a location marked 1 and then counting up while spiraling outward. For example, the first few squares are allocated like this:
|
|
|
|
```
|
|
17 16 15 14 13
|
|
18 5 4 3 12
|
|
19 6 1 2 11
|
|
20 7 8 9 10
|
|
21 22 23---> ...
|
|
```
|
|
|
|
While this is very space-efficient (no squares are skipped), requested data must be carried back to square 1 (the location of the only access port for this memory system) by programs that can only move up, down, left, or right. They always take the shortest path: the Manhattan Distance between the location of the data and square 1.
|
|
|
|
For example:
|
|
|
|
* Data from square 1 is carried 0 steps, since it's at the access port.
|
|
* Data from square 12 is carried 3 steps, such as: down, left, left.
|
|
* Data from square 23 is carried only 2 steps: up twice.
|
|
* Data from square 1024 must be carried 31 steps.
|
|
|
|
How many steps are required to carry the data from the square identified in your puzzle input all the way to the access port?
|
|
|
|
Your puzzle input is `265149`.
|
|
|
|
|