--- a/hws/hw01.tex	Wed Sep 25 11:24:34 2019 +0100
+++ b/hws/hw01.tex	Wed Sep 25 23:56:36 2019 +0100
@@ -1,3 +1,4 @@
+% !TEX program = xelatex
 \documentclass{article}
 \usepackage{../style}