15b

fünfzehn.py

@@ -5,4 +5,29 @@ from useful import *
 def hush(s):
     return reduce(lambda a, b: (a+ord(b))*17%256, s, 0)
 
-print(sum(hush(s) for s in open(0).read().strip().split(',')))
+steps = open(0).read().strip().split(',')
+
+print(sum(hush(s) for s in steps))
+
+boxen = [deque() for _ in range(256)]
+
+for s in steps:
+    if s[-1] == '-':
+        id = s[:-1]
+        box = boxen[hush(id)]
+        for i in range(len(box)):
+            if box[i][0] == id:
+                del box[i]
+                break
+    else:
+        id, vstr = s.split('=')
+        box = boxen[hush(id)]
+        val = int(vstr)
+        for i in range(len(box)):
+            if box[i][0] == id:
+                box[i][1] = val
+                break
+        else:
+            box.append([id, val])
+
+print(sum((i+1) * (j+1) * foc for i, b in enumerate(boxen) for j, (s, foc) in enumerate(b)))