@@ -35,19 +35,26 @@ def quick_sort(collection):
 >>> quick_sort([-2, -5, -45])
 [-45, -5, -2]
 """
-if len(collection) <= 1:
+total_elements = len(collection)
+
+if total_elements <= 1:
 return collection
 less = []
 equal = []
 greater = []
 pivot = collection[0]
-for x in collection:
-if x < pivot:
-less.append(x)
-elif x == pivot:
-equal.append(x)
+
+equal.append(pivot)
+
+for i in range(1, total_elements):
+element = collection[i]
+
+if element < pivot:
+less.append(element)
+elif element == pivot:
+equal.append(element)
 else:
-greater.append(x)
+greater.append(element)
 return quick_sort(less) + equal + quick_sort(greater)