diff --git a/a1/program.c b/a1/program.c
index a68e5d7..89aac30 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -1,5 +1,7 @@
 #include <stdio.h>
-#include <ctype.h>
+#include <string.h>
+
+#define MAX_SIZE 100
 
 int main() {
     return 0;