Solve 2015 days 11-14.

2015/d12.py

@@ -0,0 +1,27 @@
+import json
+
+data = open(0).read().strip()
+part_2 = False
+
+def addup(d):
+    r = 0
+    if isinstance(d, list):
+        for e in d:
+            v = addup(e)
+            if v is not None:
+                r += v
+    elif isinstance(d, dict):
+        for e in d.values():
+            v = addup(e)
+            if v is None:
+                return 0
+            r += v
+    elif isinstance(d, str):
+        if part_2 and d == "red":
+            return None
+    else:
+        r += d
+    return r
+
+data = json.loads(data)
+print(addup(data))