diff --git a/thor.c b/thor.c
index 367e313..272e89f 100644
--- a/thor.c
+++ b/thor.c
@@ -1,8 +1,19 @@
 #include <stdio.h>
+#include <stdlib.h>
 
 // run using gcc thor.c && ./a.out
 
 int main(int argc, char **argv){
-   printf("Hello, World!");
-   return 0;
+    if(argc != 2) {
+        printf("enter one argument for n");
+        return 1;
+    }
+    unsigned int n = atoi(argv[1]);
+    printf("claculating number y of rotaionally asymmetric polycubes with n = %u ...\n", n);
+    unsigned int y = rot_asy_polyc(n);
+    printf("y = %u\n", y);
+    return 0;
+}
+unsigned int rot_asy_polyc(n) {
+    
 }
\ No newline at end of file