diff --git a/test.c b/test.c
index 724681b..e11ec2f 100644
--- a/test.c
+++ b/test.c
@@ -1,21 +1,18 @@
 #include <stdio.h>
+#include <stdlib.h>
 
-int main() {
-   int a, b, c, i, n;
-
-   n = 10000;
-
-   a = b = 1;
-   
-   printf("%d %d ",a,b);
-
-   for(i = 1; i <= n-2; i++) {
-      c = a + b;
-      printf("%d ", c);
-      
-      a = b;
-      b = c;
-   }
-   
-   return 0;
+int fibonacci( int n ) {
+   n = 1000000;
+   if ( n <= 1 ) return n;
+   return fibonacci( n - 1 ) + fibonacci ( n - 2);
+}
+
+int main(int argc, char *argv[]) {
+    if (argc != 2) {
+        printf("Usage: %s <number>\n", argv[0]);
+        return 1;
+    }
+    int n = atoi(argv[1]);
+    printf("%d\n", fibonacci(n));
+    return 0;
 }