optimized versions of day 15

interesting discoveries:
  * using a list instead of a dict made a difference, but not a lot
  * declaring the code in a function instead of as "global code" made *A
    LOT* of difference. I guess it has to do with the variables being
    global in that case

15/1.py

@@ -1,21 +1,24 @@
-content = [2,0,6,12,1,3]
+def play_number_of_turns(turns):
+    content = [2,0,6,12,1,3]
 
-spoken = {}
+    spoken = [0] * turns
-new_spoken = 0
+    new_spoken = 0
-turn = 1
+    turn = 1
-for c in content:
+    for c in content:
-    spoken[c] = turn
+        spoken[c] = turn
-    turn += 1
+        turn += 1
 
-last_turn = 0
+    last_turn = 0
-while turn <= 2020:
+    while turn <= turns:
-    if not last_turn:
+        if not last_turn:
-        new_spoken = 0
+            new_spoken = 0
-    else:
+        else:
-        new_spoken = turn - 1 - last_turn
+            new_spoken = turn - 1 - last_turn
 
-    last_turn = spoken.get(new_spoken, 0)
+        last_turn = spoken[new_spoken]
-    spoken[new_spoken] = turn
+        spoken[new_spoken] = turn
-    turn += 1
+        turn += 1
 
-print(new_spoken)
+    print(new_spoken)
+
+play_number_of_turns(2020)

15/2.py

@@ -1,21 +1,24 @@
-content = [2,0,6,12,1,3]
+def play_number_of_turns(turns):
+    content = [2,0,6,12,1,3]
 
-spoken = {}
+    spoken = [0] * turns
-new_spoken = 0
+    new_spoken = 0
-turn = 1
+    turn = 1
-for c in content:
+    for c in content:
-    spoken[c] = turn
+        spoken[c] = turn
-    turn += 1
+        turn += 1
 
-last_turn = 0
+    last_turn = 0
-while turn <= 30000000:
+    while turn <= turns:
-    if not last_turn:
+        if not last_turn:
-        new_spoken = 0
+            new_spoken = 0
-    else:
+        else:
-        new_spoken = turn - 1 - last_turn
+            new_spoken = turn - 1 - last_turn
 
-    last_turn = spoken.get(new_spoken, 0)
+        last_turn = spoken[new_spoken]
-    spoken[new_spoken] = turn
+        spoken[new_spoken] = turn
-    turn += 1
+        turn += 1
 
-print(new_spoken)
+    print(new_spoken)
+
+play_number_of_turns(30000000)