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-771-jewels-and-stones.rkt | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 leetcode/lc-771-jewels-and-stones.rkt

(limited to 'leetcode/lc-771-jewels-and-stones.rkt')

diff --git a/leetcode/lc-771-jewels-and-stones.rkt b/leetcode/lc-771-jewels-and-stones.rkt
new file mode 100644
index 0000000..40ccf14
--- /dev/null
+++ b/leetcode/lc-771-jewels-and-stones.rkt
@@ -0,0 +1,6 @@
+#lang racket
+
+(define/contract (num-jewels-in-stones jewels stones)
+  (-> string? string? exact-integer?)
+  (for/sum ([jewel (in-string jewels)])
+    (count (curry char=? jewel) (string->list stones))))
\ No newline at end of file
-- 
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