1 files changed, 116 insertions, 0 deletions
diff --git a/day11/day11.py b/day11/day11.py
new file mode 100644
index 0000000..6c3b711
--- /dev/null
+++ b/day11/day11.py
@@ -0,0 +1,116 @@
+"""Day 11."""
+with open("input") as f:
+    CHART = tuple(tuple(x) for x in f.read().rstrip().split("\n"))
+
+EMPTY = 'L'
+OCCUPIED = '#'
+FLOOR = '.'
+
+MIN = 0
+MAX = len(CHART[0]) - 1
+
+def clamp(num, minimium, maximium):
+    """Clamp a number in between a range."""
+    if num <= minimium:
+        return minimium
+    if num >= maximium:
+        return maximium
+    return num
+
+
+def get_neighbours(x, y):
+    """Get neighbour cords for a point."""
+    pairs = set()
+    for i in range(x - 1, x + 2):
+        for j in range(y - 1, y + 2):
+            pairs.add(
+                (
+                    clamp(i, MIN, MAX),
+                    clamp(j, MIN, MAX)
+                )
+            )
+    # Remove self
+    pairs.remove((x, y))
+    return pairs
+
+
+def get_seat(x, y, chart):
+    """so we can call x, then y."""
+    return CHART[y][x]
+
+
+def iterate_over_chart(chart, p=False):
+    new_map = []
+    for y, row in enumerate(chart):
+        new_map.append([])
+        for x, col in enumerate(row):
+            seat = chart[y][x]
+            neighbours = [chart[pair[1]][pair[0]] for pair in get_neighbours(x, y)]
+            occupied_sum = sum(1 if x == OCCUPIED else 0 for x in neighbours)
+            if seat == EMPTY and not any(x == OCCUPIED for x in neighbours):
+                new_map[y].append(OCCUPIED)
+                continue
+            elif seat == OCCUPIED and occupied_sum >= 4:
+                new_map[y].append(EMPTY)
+                continue
+            else:
+                new_map[y].append(seat)
+            if p:
+                print(y, x, seat)
+                print([(pair[1], pair[0]) for pair in get_neighbours(x, y)])
+                print(neighbours)
+                print(occupied_sum)
+                print()
+    return new_map
+
+def print_chart(chart):
+    for y in chart:
+        line = ""
+        for x in y:
+            line += x
+        print(line)
+
+
+def are_equal(chart1, chart2):
+    for idx, _ in enumerate(chart1):
+        if chart1[idx] != chart2[idx]:
+            return False
+    return True
+
+def count_occupied(chart):
+    count = 0
+    for row in chart:
+        for x in row:
+            if x == OCCUPIED:
+                count += 1
+    return count
+
+
+
+
+initial = CHART
+count = 0
+while True:
+    new_chart = iterate_over_chart(initial)
+    if are_equal(new_chart, initial):
+        print(count_occupied(new_chart))
+        print("done")
+        break
+    else:
+        # print_chart(new_chart)
+        print(count)
+        count += 1
+    initial = new_chart
+
+
+# while True:
+# print_chart(CHART)
+# print()
+new_chart = iterate_over_chart(CHART)
+print(are_equal(initial, new_chart))
+# print()
+
+# # new_chart = print_iterate_over_chart(new_chart)
+# new_chart = iterate_over_chart(new_chart)
+# print_chart(new_chart)
+# print()