From 0ca7d516c2ac981764003808786acfddc847d619 Mon Sep 17 00:00:00 2001
From: William Redding <williamdredding@gmail.com>
Date: Wed, 8 Jan 2025 20:27:55 +0000
Subject: [PATCH] 2015 day 6

---
 puzzles/Y2015/D6/p1.py | 35 +++++++++++++++++++++++++++++++++++
 puzzles/Y2015/D6/p2.py | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 puzzles/Y2015/D6/p1.py
 create mode 100644 puzzles/Y2015/D6/p2.py

diff --git a/puzzles/Y2015/D6/p1.py b/puzzles/Y2015/D6/p1.py
new file mode 100644
index 0000000..8ca9db0
--- /dev/null
+++ b/puzzles/Y2015/D6/p1.py
@@ -0,0 +1,35 @@
+import re
+from typing import Any
+
+
+def turn_on(current: bool) -> bool:
+    return True
+
+
+def turn_off(current: bool) -> bool:
+    return False
+
+
+def toggle(current: bool) -> bool:
+    return not current
+
+
+def puzzle(input: str) -> Any:
+    lights = [[False for _ in range(1000)] for _ in range(1000)]
+    lines = [line.strip() for line in input.strip().splitlines()]
+    for line in lines:
+        for regex, function in [
+            (r"turn on (\d+),(\d+) through (\d+),(\d+)", turn_on),
+            (r"turn off (\d+),(\d+) through (\d+),(\d+)", turn_off),
+            (r"toggle (\d+),(\d+) through (\d+),(\d+)", toggle),
+        ]:
+            match = re.match(regex, line)
+            if match:
+                x0, y0 = int(match.group(1)), int(match.group(2))
+                x1, y1 = int(match.group(3)), int(match.group(4))
+
+                for x in range(x0, x1 + 1):
+                    for y in range(y0, y1 + 1):
+                        lights[y][x] = function(lights[y][x])
+                break
+    return sum(sum(row) for row in lights)
diff --git a/puzzles/Y2015/D6/p2.py b/puzzles/Y2015/D6/p2.py
new file mode 100644
index 0000000..9e81a82
--- /dev/null
+++ b/puzzles/Y2015/D6/p2.py
@@ -0,0 +1,35 @@
+import re
+from typing import Any
+
+
+def turn_on(current: int) -> int:
+    return current + 1
+
+
+def turn_off(current: int) -> int:
+    return max(current - 1, 0)
+
+
+def flip(current: int) -> int:
+    return current + 2
+
+
+def puzzle(input: str) -> Any:
+    lights = [[0 for _ in range(1000)] for _ in range(1000)]
+    lines = [line.strip() for line in input.strip().splitlines()]
+    for line in lines:
+        for regex, function in [
+            (r"turn on (\d+),(\d+) through (\d+),(\d+)", turn_on),
+            (r"turn off (\d+),(\d+) through (\d+),(\d+)", turn_off),
+            (r"toggle (\d+),(\d+) through (\d+),(\d+)", flip),
+        ]:
+            match = re.match(regex, line)
+            if match:
+                x0, y0 = int(match.group(1)), int(match.group(2))
+                x1, y1 = int(match.group(3)), int(match.group(4))
+
+                for x in range(x0, x1 + 1):
+                    for y in range(y0, y1 + 1):
+                        lights[y][x] = function(lights[y][x])
+                break
+    return sum(sum(row) for row in lights)