1 files changed, 12 insertions, 0 deletions
diff --git a/racket/leetcode/lc-520-detect-capital.rkt b/racket/leetcode/lc-520-detect-capital.rkt
new file mode 100644
index 0000000..80b5f7e
--- /dev/null
+++ b/racket/leetcode/lc-520-detect-capital.rkt
@@ -0,0 +1,12 @@
+#lang racket
+
+(define/contract (detect-capital-use word)
+  (-> string? boolean?)
+  (if 
+   (member word (list (string-upcase word)
+                      (string-downcase word)
+                      (string-titlecase word)))
+   #true
+   #false))
+
+(detect-capital-use "Google")
+\ No newline at end of file