From 8b771bc4d91be9da3e158333b6e6b5df574453ff Mon Sep 17 00:00:00 2001
From: StarlitGhost <679547+StarlitGhost@users.noreply.github.com>
Date: Mon, 25 Dec 2023 17:34:14 +0000
Subject: [PATCH] [2023/25] solved

---
 2023/25/example   | 13 +++++++++++++
 2023/25/script.py | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 2023/25/example
 create mode 100644 2023/25/script.py

diff --git a/2023/25/example b/2023/25/example
new file mode 100644
index 0000000..bbfda0b
--- /dev/null
+++ b/2023/25/example
@@ -0,0 +1,13 @@
+jqt: rhn xhk nvd
+rsh: frs pzl lsr
+xhk: hfx
+cmg: qnr nvd lhk bvb
+rhn: xhk bvb hfx
+bvb: xhk hfx
+pzl: lsr hfx nvd
+qnr: nvd
+ntq: jqt hfx bvb xhk
+nvd: lhk
+lsr: lhk
+rzs: qnr cmg lsr rsh
+frs: qnr lhk lsr
diff --git a/2023/25/script.py b/2023/25/script.py
new file mode 100644
index 0000000..9293e9f
--- /dev/null
+++ b/2023/25/script.py
@@ -0,0 +1,47 @@
+from GhostyUtils import aoc
+from collections import defaultdict, Counter
+import random
+
+
+def bfs(components, start, end):
+    visited = set()
+    frontier = [[start]]
+    while frontier:
+        path = frontier.pop(0)
+        node = path[-1]
+        if node == end:
+            return path
+        for new_node in components[node]:
+            if new_node in visited:
+                continue
+            visited.add(new_node)
+            frontier.append(path + [new_node])
+    return visited
+
+
+def main():
+    components = defaultdict(set)
+    for wires in aoc.read_lines():
+        comp, connections = wires.split(': ')
+        components[comp].update(connections.split())
+        for other_comp in components[comp]:
+            components[other_comp].add(comp)
+
+    seen = defaultdict(int)
+    for _ in range(1000):
+        comps = random.sample(list(components.keys()), 2)
+        path = bfs(components, comps[0], comps[1])
+        for link in zip(path, path[1:]):
+            seen[tuple(sorted(link))] += 1
+    snips = Counter(seen).most_common(3)
+    for snip in snips:
+        l, r = snip[0]
+        components[l].remove(r)
+        components[r].remove(l)
+    one = bfs(components, snips[0][0][0], None)
+    two = bfs(components, snips[0][0][1], None)
+    print('p1:', len(one) * len(two), f'| one: {len(one)} two: {len(two)}')
+
+
+if __name__ == "__main__":
+    main()