From a9ee47b61558efe09aee23f5671aabd0c3747e8a Mon Sep 17 00:00:00 2001
From: Joe Zhao <ztuowen@gmail.com>
Date: Tue, 17 Mar 2015 11:05:29 +0800
Subject: p -> h

---
 h3.hs | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 h3.hs

(limited to 'h3.hs')

diff --git a/h3.hs b/h3.hs
new file mode 100644
index 0000000..7c8604d
--- /dev/null
+++ b/h3.hs
@@ -0,0 +1,7 @@
+elementAt :: [a] -> Integer -> Maybe a
+
+elementAt [] _ = Nothing
+elementAt (x:xs) 1 = Just x
+elementAt (x:xs) n
+    | n>1 = elementAt xs (n-1)
+    | otherwise = Nothing
-- 
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