diff --git a/highscores.txt b/highscores.txt
index 4bad879..a73fd89 100644
--- a/highscores.txt
+++ b/highscores.txt
@@ -1,3 +1,7 @@
+NAME;21730
+jakob;11918
 jakob;11860
 Jakob;4974
 player1;3999
+NAME;2997
+NAME;2995
diff --git a/numbers.c b/numbers.c
index 8019cac..788af79 100644
--- a/numbers.c
+++ b/numbers.c
@@ -27,33 +27,29 @@ unsigned int setSeed(unsigned int seed_test)
 
 void create_unique_random_numbers(unsigned int len, unsigned int numbers[])
 {
-  for (unsigned int i = 0; i < len; i++)
-  {
-    unsigned int same = 0;
+    TreeNode *root = NULL;
+    int isDuplicate;
 
-    do
+    for (unsigned int i = 0; i < len; i++)
     {
-      unsigned int value = 0;
-      value = (rand() % (len * 2) + 1);
-
-      same = 0;
-
-      for (unsigned int j = 0; j < i; j++)
-      {
-        if (numbers[j] == value)
+        unsigned int same = 0;
+        do
         {
-          same = 1;
-          break;
-        }
-      }
+            unsigned int value = rand() % (len * 2) + 1;
+            root = addToTree(root, &value, sizeof(unsigned int), compare, &isDuplicate);
+            if (isDuplicate)
+            {
+                same = 1;
+            }
+            else
+            {
+                numbers[i] = value;
+                same = 0;
+            }
+        } while (same);
+    }
 
-      if (same == 0)
-      {
-        numbers[i] = value;
-      }
-
-    } while (same == 1);
-  }
+    clearTree(root);
 }
 
 unsigned int *createNumbers(unsigned int len)