From 48e35ad3b0b0c62f936784e4aca70b17c3b0e3f9 Mon Sep 17 00:00:00 2001
From: Hunky Jimpjorps <thechairman@thechairman.info>
Date: Fri, 2 Feb 2024 17:05:12 -0500
Subject: renaming

---
 aoc2023-racket/day-09/day-09-polynomial.rkt | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 aoc2023-racket/day-09/day-09-polynomial.rkt

(limited to 'aoc2023-racket/day-09/day-09-polynomial.rkt')

diff --git a/aoc2023-racket/day-09/day-09-polynomial.rkt b/aoc2023-racket/day-09/day-09-polynomial.rkt
new file mode 100644
index 0000000..5bacb1f
--- /dev/null
+++ b/aoc2023-racket/day-09/day-09-polynomial.rkt
@@ -0,0 +1,17 @@
+#lang racket
+
+(require advent-of-code
+         threading
+         simple-polynomial/tools)
+
+(define histories
+  (for/list ([raw-history (in-lines (open-aoc-input (find-session) 2023 9 #:cache #true))])
+    (~>> raw-history 
+         string-split 
+         (map string->number))))
+
+(for/lists (left right #:result (cons (apply + left) (apply + right)))
+           ([history (in-list histories)])
+  (define f (interpolate-at-integer-points history))
+  (values (f -1) 
+          (f (length history))))
-- 
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