diff --git a/du4/program.c b/du4/program.c
new file mode 100644
index 0000000..f0aeabc
--- /dev/null
+++ b/du4/program.c
@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+int main(){
+
+}
diff --git a/du5/program.c b/du5/program.c
new file mode 100644
index 0000000..f0aeabc
--- /dev/null
+++ b/du5/program.c
@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+int main(){
+
+}