From fafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1 Mon Sep 17 00:00:00 2001
From: HJ <thechairman@thechairman.info>
Date: Tue, 17 Jan 2023 12:46:04 -0500
Subject: adding old leetcode solutions

---
 leetcode/lc-944-delete-columns.rkt | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 leetcode/lc-944-delete-columns.rkt

(limited to 'leetcode/lc-944-delete-columns.rkt')

diff --git a/leetcode/lc-944-delete-columns.rkt b/leetcode/lc-944-delete-columns.rkt
new file mode 100644
index 0000000..f9714b7
--- /dev/null
+++ b/leetcode/lc-944-delete-columns.rkt
@@ -0,0 +1,7 @@
+#lang racket
+(define/contract (min-deletion-size strs)
+  (-> (listof string?) exact-integer?)
+  (define transposed-strs (apply map list (map string->list strs)))
+  (count (λ (s) (not (equal? s (sort s char<?)))) transposed-strs))
+
+(min-deletion-size '["cba" "daf" "ghi"])
-- 
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