From 8777ff071f7bb37631baa7b6717ad29961e50911 Mon Sep 17 00:00:00 2001
From: "H.J" <thechairman@thechairman.info>
Date: Wed, 9 Oct 2024 11:36:55 -0400
Subject: sorting by language

---
 racket/aoc2015/day-01/day-01.rkt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 racket/aoc2015/day-01/day-01.rkt

(limited to 'racket/aoc2015/day-01')

diff --git a/racket/aoc2015/day-01/day-01.rkt b/racket/aoc2015/day-01/day-01.rkt
new file mode 100644
index 0000000..efbd02a
--- /dev/null
+++ b/racket/aoc2015/day-01/day-01.rkt
@@ -0,0 +1,16 @@
+#lang racket
+(require "../../jj-aoc.rkt")
+
+;; part 1
+(for/fold ([current-floor 0]) ([l (in-input-port-chars (open-day 1 2015))] [i (in-naturals)])
+  (match l
+    [#\( (add1 current-floor)]
+    [#\) (sub1 current-floor)]))
+
+;; part 2
+(for/fold ([current-floor 0] [last-index 0] #:result (add1 last-index))
+          ([l (in-input-port-chars (open-day 1 2015))] [i (in-naturals)])
+  #:break (= current-floor -1)
+  (match l
+    [#\( (values (add1 current-floor) i)]
+    [#\) (values (sub1 current-floor) i)]))
-- 
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