diff --git a/day3/.gitignore b/day3/.gitignore
new file mode 100644
index 0000000..52b5c17
--- /dev/null
+++ b/day3/.gitignore
@@ -0,0 +1,10 @@
+*
+
+!.gitignore
+!answer*
+!*.c
+*.mod.c
+!sample*
+!README.md
+!LICENSE.md
+!Makefile