diff --git a/doble.exe b/doble.exe
index dbea490..2df53f1 100644
Binary files a/doble.exe and b/doble.exe differ
diff --git a/numbers.c b/numbers.c
index ebe5cad..e83fabb 100644
--- a/numbers.c
+++ b/numbers.c
@@ -42,7 +42,12 @@ unsigned int *createNumbers(unsigned int len)
     }
 
   }
-  numbers[rand()% (len+1)] = rand()% ((2* len) + 1);
+  //numbers[rand()% (len+1)] = rand()% ((2* len) + 1);
+  size_t dupIndex = rand() % len;         // Index, der dupliziert wird
+  size_t targetIndex = rand() % len;      // Ziel-Index, wo das Duplikat hin soll
+  if (dupIndex != targetIndex) {
+    numbers[targetIndex] = numbers[dupIndex]; // echtes Duplikat
+}
   return numbers;
   free(numbers);
 }
diff --git a/numbers.o b/numbers.o
index a1401c1..e0c80fc 100644
Binary files a/numbers.o and b/numbers.o differ