1 files changed, 7 insertions, 0 deletions
diff --git a/61-69/61a.hs b/61-69/61a.hs
new file mode 100644
index 0000000..c7c3662
--- /dev/null
+++ b/61-69/61a.hs
@@ -0,0 +1,7 @@
+data Tree a = Empty | Branch a (Tree a) (Tree a) deriving (Show, Eq)
+
+leaves :: Tree a -> [a]
+
+leaves Empty = []
+leaves (Branch x Empty Empty) = [x]
+leaves (Branch _ l r) = leaves l ++ leaves r