Initial commit with days 1, 2, and 3

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

day02/day02.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+import sys
+from typing import Sequence, Tuple
+
+
+def part1(lines: Sequence[Tuple[str, int]]):
+    horz = 0
+    depth = 0
+    for direction, amount in lines:
+        if direction == "forward":
+            horz += amount
+        elif direction == "down":
+            depth += amount
+        elif direction == "up":
+            depth -= amount
+        else:
+            assert False, f"not sure how to handle {direction}"
+    print(f"horizontal position: {horz}")
+    print(f"depth: {depth}")
+    print(f"product: {depth * horz}")
+
+
+def part2(lines: Sequence[Tuple[str, int]]):
+    horz = 0
+    depth = 0
+    aim = 0
+    for direction, amount in lines:
+        if direction == "forward":
+            horz += amount
+            depth += aim * amount
+        elif direction == "down":
+            aim += amount
+        elif direction == "up":
+            aim -= amount
+        else:
+            assert False, f"not sure how to handle {direction}"
+    print(f"horizontal position: {horz}")
+    print(f"depth: {depth}")
+    print(f"product: {depth * horz}")
+
+
+lines = [(direction, int(amount)) for direction, amount in map(str.split, sys.stdin)]
+
+print("Part 1")
+part1(lines)
+print("Part 2")
+part2(lines)