Day 25: Snowverload
Megathread guidelines
- Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever)
- You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ if you prefer sending it through a URL
FAQ
- What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268
- Where do I participate?: https://adventofcode.com/
- Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465
Python
import networkx as nx from .solver import Solver class Day25(Solver): def __init__(self): super().__init__(25) def presolve(self, input: str): self.graph = nx.Graph() for line in input.splitlines(): from_, to_line = line.split(': ') for to in to_line.split(' '): self.graph.add_edge(from_, to) def solve_first_star(self) -> int | str: cut_value, partition = nx.algorithms.stoer_wagner(self.graph) return len(partition[0]) * len(partition[1])