1 files changed, 1 insertions, 0 deletions
diff --git a/Puzzle4.hs b/Puzzle4.hs
index f874960..35ac206 100644
--- a/Puzzle4.hs
+++ b/Puzzle4.hs
@@ -1,3 +1,4 @@
+-- Author: Yuchen Pei (me@ypei.me)
 import Data.List.Split (splitOn)
 import Data.List (nub, sort)
 -- import Data.List.Unique (allUnique)