[Python/2015] Move solutions into .py files

Python/2015/01.py

@@ -0,0 +1,9 @@
+from lib import *
+
+input = read_input(2015, 1)
+
+x = 0
+cum = [(x := x + [-1, 1][c == "("]) for c in input]
+
+print(cum[-1])
+print(cum.index(-1) + 1)

Python/2015/02.py

@@ -0,0 +1,15 @@
+from lib import *
+
+input = read_input(2015, 2)
+
+boxes = [sorted(map(int, line.split("x"))) for line in input.splitlines()]
+
+total = 0
+for a, b, c in boxes:
+    total += 2 * (a * b + a * c + b * c) + a * b
+print(total)
+
+total = 0
+for a, b, c in boxes:
+    total += 2 * (a + b) + a * b * c
+print(total)

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]))))