diff --git a/numbers.c b/numbers.c
index a83a5ff..694c6e7 100644
--- a/numbers.c
+++ b/numbers.c
@@ -31,8 +31,8 @@ unsigned int* createNumbers(unsigned int len)
   TreeNode *numbers;
 
   int isDuplicate = 0;
-  int number = rand() % (2 * len) + 1;
-  int* array = malloc(len*sizeof(int));
+  unsigned int number = rand() % (2 * len) + 1;
+  unsigned int* array = malloc(len*sizeof(int));
 
   numbers = addToTree(NULL, &number, sizeof(int), compareFct, &isDuplicate);
   array[0] = number;
@@ -49,6 +49,8 @@ unsigned int* createNumbers(unsigned int len)
     }
   }
 
+  clearTree(numbers);
+
   int duplicatePosition1 = rand() % len;
   int duplicatePosition2 = rand() % len;
 
@@ -65,7 +67,7 @@ unsigned int* createNumbers(unsigned int len)
 unsigned int getDuplicate(const unsigned int numbers[], unsigned int len)
 {
   qsort(numbers, len, sizeof(int), compareFct);
-  
+
   for(int i = 0; i < len-1; i++){
     if(numbers[i] == numbers[i+1]){
       return numbers[i];