Day 2: Add Python solution

02/solution_1.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+from collections import defaultdict
+d = defaultdict(int)
+
+with open("input.txt", "r") as _input:
+    for i, n in [x.split(' ') for x in _input.readlines()]:
+        d[i] += int(n)
+
+print("Answer:", (d["down"] - d["up"]) * d["forward"])

02/solution_2.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+aim = 0
+h = 0
+v = 0
+
+with open("input.txt", "r") as _input:
+    for i, n in [x.split(' ') for x in _input.readlines()]:
+        n = int(n)
+        if i == "down": aim += n
+        elif i == "up": aim -= n
+        elif i == "forward": h += n; v += aim * n
+
+print("Answer:", h * v)