add day 24

24/1.py

@@ -0,0 +1,39 @@
+with open("input") as f:
+    content = [x.strip() for x in f]
+
+white = 0
+black = 1
+floor = [white] * 50
+for i in range(len(floor)):
+    floor[i] = [white] * 50
+
+prev = None
+for m in content:
+    x = 25
+    y = 25
+    for c in m:
+        if c == "s":
+            y += 1
+        elif c == "n":
+            y -= 1
+        elif c == "e":
+            if prev not in ["s"]:
+                x += 1
+        elif c == "w":
+            if prev not in ["n"]:
+                x -= 1
+        if c in ["e", "w"]:
+            if prev in ["n", "s"]:
+                print(f"{prev}{c}", x,y)
+            else:
+                print(c, x,y)
+        prev = c
+
+    print(f"switching {x},{y} from {floor[y][x]}")
+    floor[y][x] = white if floor[y][x] == black else black
+
+result = 0
+for x in floor:
+    result += x.count(black)
+
+print(result)

24/2.py

@@ -0,0 +1,56 @@
+with open("einput") as f:
+    content = [x.strip() for x in f]
+
+white = 0
+black = 1
+floor = [white] * 140
+for i in range(len(floor)):
+    floor[i] = [white] * 140
+
+prev = None
+for m in content:
+    x = int(len(floor) / 2)
+    y = int(len(floor[0]) / 2)
+    for c in m:
+        if c == "s":
+            y += 1
+        elif c == "n":
+            y -= 1
+        elif c == "e":
+            if prev not in ["s"]:
+                x += 1
+        elif c == "w":
+            if prev not in ["n"]:
+                x -= 1
+        prev = c
+
+    floor[y][x] = white if floor[y][x] == black else black
+
+def count_adjacent(grid, x, y):
+    return [
+        grid[y][x-1],  # west
+        grid[y][x+1],  # east
+        grid[y-1][x],  # north-west
+        grid[y-1][x+1], # north-east
+        grid[y+1][x], # south-east
+        grid[y+1][x-1] # south-west
+        ].count(black)
+
+for day in range(100):
+    new_floor = [white] * len(floor)
+    for i in range(len(new_floor)):
+        new_floor[i] = floor[i].copy()
+    for y in range(1, len(floor) - 1):
+        for x in range(1, len(floor[y]) - 1):
+            adj = count_adjacent(floor, x, y)
+            if floor[y][x] == black and (adj == 0 or adj > 2):
+                new_floor[y][x] = white
+            elif floor[y][x] == white and adj == 2:
+                new_floor[y][x] = black
+    floor = new_floor.copy()
+
+result = 0
+for x in floor:
+    result += x.count(black)
+
+print(result)

24/einput

@@ -0,0 +1,20 @@
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24/input

@@ -0,0 +1,450 @@
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