[Python/2015] Move solutions into .py files

Python/2015/03.py

@@ -0,0 +1,18 @@
+from lib import *
+
+input = read_input(2015, 3)
+
+
+def get_houses(instructions):
+    houses = [(x := 0, y := 0)]
+    for c in instructions:
+        x += c == ">"
+        x -= c == "<"
+        y += c == "v"
+        y -= c == "^"
+        houses.append((x, y))
+    return houses
+
+
+print(len(set(get_houses(input))))
+print(len(set(get_houses(input[::2])) | set(get_houses(input[1::2]))))