Start with 2021

2021/d2.py

@@ -0,0 +1,24 @@
+from lib import get_data
+from lib import ints
+
+data = get_data(__file__)
+
+aim, h2, d2 = 0, 0, 0
+h, d = 0, 0
+for line in data.splitlines():
+    (v,) = ints(line)
+    if "forward" in line:
+        h2 += v
+        d2 += aim * v
+        h += v
+    elif "down" in line:
+        aim += v
+        d += v
+    elif "up" in line:
+        aim -= v
+        d -= v
+    else:
+        assert False
+
+print(h * d)
+print(h2 * d2)