From e300e71e8a5704118037f672be8bf3570d6f1041 Mon Sep 17 00:00:00 2001
From: Brechtje van Gessel <bevang@live.nl>
Date: Thu, 4 Dec 2025 20:56:54 +0100
Subject: [PATCH] solved day 4, part 2!

---
 brechtje/4/4-2.py | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 brechtje/4/4-2.py

diff --git a/brechtje/4/4-2.py b/brechtje/4/4-2.py
new file mode 100644
index 0000000..8bafd35
--- /dev/null
+++ b/brechtje/4/4-2.py
@@ -0,0 +1,45 @@
+raw_input = open('input.txt', 'r').read().splitlines()
+
+input = []
+
+for line in raw_input:
+    input.append(list(line))
+
+surrounding_spaces = [
+    {'x': -1, 'y': -1},
+    {'x': 0, 'y': -1},
+    {'x': 1, 'y': -1},
+    {'x': -1, 'y': 0},
+    {'x': 1, 'y': 0},
+    {'x': -1, 'y': 1},
+    {'x': 0, 'y': 1},
+    {'x': 1, 'y': 1}
+]
+
+prev_answer = 0
+answer = 0
+x_max = len(input[0]) - 1
+y_max = len(input) - 1
+
+while True:
+    for y, line in enumerate(input):
+        for x, char in enumerate(line):
+            if char == "@":
+                rolls = 0
+                for space in surrounding_spaces:
+                    current_x = x + space['x']
+                    current_y = y + space['y']
+                    if current_x < 0 or current_y < 0 or current_x > x_max or current_y > y_max:
+                        continue
+                    elif input[current_y][current_x] == "@":
+                        rolls += 1
+                    if rolls > 3:
+                        break
+                if rolls < 4:
+                    answer += 1
+                    input[y][x] = "."
+    if answer == prev_answer:
+        break
+    prev_answer = answer
+
+print(answer)