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/leetcode/lc-1436-destination-city.rkt | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 racket/leetcode/lc-1436-destination-city.rkt

(limited to 'racket/leetcode/lc-1436-destination-city.rkt')

diff --git a/racket/leetcode/lc-1436-destination-city.rkt b/racket/leetcode/lc-1436-destination-city.rkt
new file mode 100644
index 0000000..ce82f08
--- /dev/null
+++ b/racket/leetcode/lc-1436-destination-city.rkt
@@ -0,0 +1,14 @@
+#lang racket
+(define/contract (dest-city paths)
+  (-> (listof (listof string?)) string?)
+  (define city-pairs (make-hash paths))
+  (define (go-to-next-city origin)
+    (let ([destination (hash-ref city-pairs origin #false)])
+      (if destination
+          (go-to-next-city (car destination))
+          origin)))
+  (go-to-next-city (caar paths)))
+
+(dest-city '(("London" "New York")
+             ("New York" "Lima")
+             ("Lima" "Sao Paolo")))
\ No newline at end of file
-- 
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