diff --git a/Trolleybus/Trolleybus/BusesGenericCollection.cs b/Trolleybus/Trolleybus/BusesGenericCollection.cs
index 3de065c..08dcc19 100644
--- a/Trolleybus/Trolleybus/BusesGenericCollection.cs
+++ b/Trolleybus/Trolleybus/BusesGenericCollection.cs
@@ -52,11 +52,11 @@ namespace ProjectTrolleybus.Generics
         /// <param name="collect"></param>
         /// <param name="obj"></param>
         /// <returns></returns>
-        public static BusesGenericCollection<T, U>? operator +(BusesGenericCollection<T, U>? collect, T? obj)
+        public static int operator +(BusesGenericCollection<T, U>? collect, T? obj)
         {
-            if (obj != null)
-                collect?._collection.Insert(obj);
-            return collect;
+            if (obj == null || collect == null)
+                return -1;
+            return collect._collection.Insert(obj);
         }
         /// <summary>
         /// Перегрузка оператора вычитания
@@ -64,14 +64,12 @@ namespace ProjectTrolleybus.Generics
         /// <param name="collect"></param>
         /// <param name="pos"></param>
         /// <returns></returns>
-        public static BusesGenericCollection<T, U>? operator -(BusesGenericCollection<T, U> collect, int pos)
+        public static bool operator -(BusesGenericCollection<T, U> collect, int pos)
         {
-            T? obj = collect._collection.Get(pos);
-            if (obj != null)
-            {
-                collect?._collection.Remove(pos);
-            }
-            return collect;
+            T? obj = collect?._collection.Get(pos);
+            if (obj == null || collect == null)
+                return false;
+            return collect._collection.Remove(pos);
         }
         /// <summary>
         /// Получение объекта IMoveableObject
diff --git a/Trolleybus/Trolleybus/SetGeneric.cs b/Trolleybus/Trolleybus/SetGeneric.cs
index 1b9dd9c..eff0865 100644
--- a/Trolleybus/Trolleybus/SetGeneric.cs
+++ b/Trolleybus/Trolleybus/SetGeneric.cs
@@ -18,29 +18,29 @@ namespace ProjectTrolleybus.Generics
             _places = new T?[count];
         }
 
-        public bool Insert(T trolleybus)
+        public int Insert(T trolleybus)
         {
             if (_places[Count - 1] != null)
-                return false;
+                return -1;
             return Insert(trolleybus, 0);
         }
 
-        public bool Insert(T trolleybus, int position)
+        public int Insert(T trolleybus, int position)
         {
             if (!(position >= 0 && position < Count))
-                return false;
+                return -1;
             if (_places[position] != null)
             {
                 int ind = position;
                 while (ind < Count && _places[ind] != null)
                     ind++;
                 if (ind == Count)
-                    return false;
+                    return -1;
                 for (int i = ind - 1; i >= position; i--)
                     _places[i + 1] = _places[i];
             }
             _places[position] = trolleybus;
-            return true;
+            return position;
         }
 
         public bool Remove(int position)