day 14

14/a.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+
+def main():
+    elves = [0, 1]
+    scores = [3, 7]
+    after = 503761  # puzzle input
+
+    while True:
+        comb = str(sum([scores[i] for i in elves]))
+        for digit in comb:
+            newscore = int(digit)
+            scores.append(newscore)
+            slen = len(scores)
+            if slen > after:
+                print(newscore, end="")
+            if slen > after + 9:
+                print()
+                return
+
+        for i, elf in enumerate(elves):
+            elves[i] = (elf + 1 + scores[elf]) % slen
+
+
+if __name__ == '__main__':
+    main()
+

14/b.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+
+
+def main():
+    elves = [0, 1]
+    scores = [3, 7]
+    endseq = [5, 0, 3, 7, 6, 1]  # puzzle input
+    sqlen = len(endseq)
+
+    while True:
+        comb = str(sum([scores[i] for i in elves]))
+        for digit in comb:
+            newscore = int(digit)
+            scores.append(newscore)
+            if scores[-sqlen:] == endseq:
+                print(len(scores) - len(endseq))
+                return
+        scorelen = len(scores)
+        for i, elf in enumerate(elves):
+            elves[i] = (elf + 1 + scores[elf]) % scorelen
+
+
+if __name__ == '__main__':
+    main()
+