2021 day 2

2021/02/part1

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+
+depth = 0
+hPos = 0
+
+with open('input') as f:
+    window = []
+    for line in f:
+        cmd, numStr = line.split(" ", 2)
+        num = int(numStr)
+
+        # match...case is python 3.10+
+        if cmd == "forward":
+            hPos = hPos + num
+        elif cmd == "backward":
+            hPos = hPos - num
+        elif cmd == "up":
+            depth = depth - num
+        elif cmd == "down":
+            depth = depth + num
+        else:
+            raise "unknown command: "+cmd
+
+print(depth * hPos)
+

2021/02/part2

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+
+depth = 0
+hPos = 0
+aim = 0
+
+with open('input') as f:
+    window = []
+    for line in f:
+        cmd, numStr = line.split(" ", 2)
+        num = int(numStr)
+
+        # match...case is python 3.10+
+        if cmd == "forward":
+            hPos = hPos + num
+            depth = depth + (aim*num)
+        elif cmd == "backward":
+            hPos = hPos - num
+        elif cmd == "up":
+            aim = aim - num
+        elif cmd == "down":
+            aim = aim + num
+        else:
+            raise "unknown command: "+cmd
+
+print(depth * hPos)
+