From 8ab65dc2da1742eb86ec636c50c7018385b68167 Mon Sep 17 00:00:00 2001
From: "J.J" <thechairman@thechairman.info>
Date: Thu, 30 Nov 2023 17:10:00 -0500
Subject: prep for 2023, renaming for consistency

---
 aoc2015/day-25/day-25.rkt | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 aoc2015/day-25/day-25.rkt

(limited to 'aoc2015/day-25')

diff --git a/aoc2015/day-25/day-25.rkt b/aoc2015/day-25/day-25.rkt
new file mode 100644
index 0000000..975f4c3
--- /dev/null
+++ b/aoc2015/day-25/day-25.rkt
@@ -0,0 +1,8 @@
+#lang racket
+
+(define max-r 2978)
+(define max-c 3083)
+
+(for/fold ([code 20151125] [r 1] [c 1]) ([i (in-naturals)] #:break (and (= max-r r) (= max-c c)))
+  (define new-code (modulo (* code 252533) 33554393))
+  (if (= r 1) (values new-code (add1 c) 1) (values new-code (sub1 r) (add1 c))))
-- 
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