diff --git a/Arrays/01_static_and_dynamicArray.c b/Arrays/01_static_and_dynamicArray.c
index 1ff30400..2328de4b 100644
--- a/Arrays/01_static_and_dynamicArray.c
+++ b/Arrays/01_static_and_dynamicArray.c
@@ -1,4 +1,4 @@
-#include <stdio.h>
+#include <stdio.h>// efficient solution
 #include <stdlib.h>
 int main()
 {