diff --git a/run b/run
index bbfdc25..d963807 100755
--- a/run
+++ b/run
@@ -2,5 +2,5 @@
 
 set -e
 
-g++ main.cpp -std=c++23
+g++ src/day$1.cpp -std=c++23
 ./a.out
diff --git a/main.cpp b/src/day1.cpp
similarity index 100%
rename from main.cpp
rename to src/day1.cpp