1 files changed, 1 insertions, 0 deletions
diff --git a/Puzzle9.hs b/Puzzle9.hs
index 7027619..c8080c8 100644
--- a/Puzzle9.hs
+++ b/Puzzle9.hs
@@ -1,3 +1,4 @@
+-- Author: Yuchen Pei (me@ypei.me)
 -- Part 1 is adapted from https://github.com/ephemient/aoc2017/blob/master/src/Day9.hs
 import Data.List (mapAccumL)