diff --git a/HoistingCrane/HoistingCrane/CollectionGenericObjects/AbstractCompany.cs b/HoistingCrane/HoistingCrane/CollectionGenericObjects/AbstractCompany.cs
index b6b8cd6..7ed15c5 100644
--- a/HoistingCrane/HoistingCrane/CollectionGenericObjects/AbstractCompany.cs
+++ b/HoistingCrane/HoistingCrane/CollectionGenericObjects/AbstractCompany.cs
@@ -42,9 +42,9 @@ namespace HoistingCrane.CollectionGenericObjects
             arr.SetMaxCount = GetMaxCount;
         }
 
-        public static DrawningTrackedVehicle operator +(AbstractCompany company, DrawningTrackedVehicle car)
+        public static int operator +(AbstractCompany company, DrawningTrackedVehicle car)
         {
-            return company.arr?.Insert(car) ?? null;
+            return company.arr?.Insert(car) ?? -1;
         }
         public static DrawningTrackedVehicle operator -(AbstractCompany company, int position)
         {
diff --git a/HoistingCrane/HoistingCrane/CollectionGenericObjects/ICollectionGenericObjects.cs b/HoistingCrane/HoistingCrane/CollectionGenericObjects/ICollectionGenericObjects.cs
index 679548b..adc295a 100644
--- a/HoistingCrane/HoistingCrane/CollectionGenericObjects/ICollectionGenericObjects.cs
+++ b/HoistingCrane/HoistingCrane/CollectionGenericObjects/ICollectionGenericObjects.cs
@@ -17,14 +17,14 @@ namespace HoistingCrane.CollectionGenericObjects
         /// </summary>
         /// <param name="obj"></param>
         /// <returns></returns>
-        T? Insert(T obj);
+        int Insert(T obj);
         /// <summary>
         /// Добавление элемента в коллекцию на определенную позицию
         /// </summary>
         /// <param name="obj"></param>
         /// <param name="position"></param>
         /// <returns></returns>
-        T? Insert(T obj, int position);
+        int Insert(T obj, int position);
         /// <summary>
         /// Удаление элемента из коллекции по его позиции
         /// </summary>
diff --git a/HoistingCrane/HoistingCrane/CollectionGenericObjects/ListGenericObjects.cs b/HoistingCrane/HoistingCrane/CollectionGenericObjects/ListGenericObjects.cs
index ba05f0a..3af71fa 100644
--- a/HoistingCrane/HoistingCrane/CollectionGenericObjects/ListGenericObjects.cs
+++ b/HoistingCrane/HoistingCrane/CollectionGenericObjects/ListGenericObjects.cs
@@ -39,7 +39,7 @@ namespace HoistingCrane.CollectionGenericObjects
         public T? Get(int position)
         {
             // TODO проверка позиции
-            if(position >= 0 && position < list.Count)
+            if(position >= 0 && position < _maxCount)
             {
                 return list[position];
             }
@@ -47,7 +47,7 @@ namespace HoistingCrane.CollectionGenericObjects
         }
 
 
-        public T? Insert(T obj)
+        public int Insert(T obj)
         {
             // TODO проверка, что не превышено максимальное количество элементов
             // TODO вставка в конец набора
@@ -55,23 +55,34 @@ namespace HoistingCrane.CollectionGenericObjects
             {
                 return Insert(obj, 0);
             }
-            return null;
+            return -1;
         }
 
-        public T? Insert(T obj, int position)
+        public int Insert(T obj, int position)
         {
             // TODO проверка, что не превышено максимальное количество элементов
             // TODO проверка позиции
             // TODO вставка по позиции
-            if(position >= 0 && position < list.Count)
+            if(position >= 0 && position < _maxCount)
             {
                 if (list[position] == null)
                 {
                     list.Add(obj);
-                    return list[position];
+                    return position;
+                }
+                else
+                {
+                    if (Insert(obj, position + 1) != -1)
+                    {
+                        return position;
+                    }
+                    if (Insert(obj, position - 1) != -1)
+                    {
+                        return position;
+                    }
                 }
             }
-            return null;
+            return -1;
 
         }
 
diff --git a/HoistingCrane/HoistingCrane/CollectionGenericObjects/MassivGenericObjects.cs b/HoistingCrane/HoistingCrane/CollectionGenericObjects/MassivGenericObjects.cs
index bd5beca..ef399d3 100644
--- a/HoistingCrane/HoistingCrane/CollectionGenericObjects/MassivGenericObjects.cs
+++ b/HoistingCrane/HoistingCrane/CollectionGenericObjects/MassivGenericObjects.cs
@@ -31,7 +31,7 @@ namespace HoistingCrane.CollectionGenericObjects
             return null;  
         }
 
-        public T? Insert(T obj)
+        public int Insert(T obj)
         {
             for (int i = 0; i < Count; i++)
             {
@@ -40,34 +40,34 @@ namespace HoistingCrane.CollectionGenericObjects
                     return Insert(obj, 0);
                 }
             }
-            return null;
+            return -1;
         }
 
-        public T? Insert(T obj, int position)
+        public int Insert(T obj, int position)
         {
             //todo Проверка позиции
             if (position < 0 || position > Count)
             {
-                return null;
+                return -1;
             }
 
             if (arr[position] == null)
             {
                 arr[position] = obj;
-                return arr[position];
+                return position;
             }
             else
             {
-                if (Insert(obj, position + 1) != null)
+                if (Insert(obj, position + 1) != -1)
                 {
-                    return arr[position + 1];
+                    return position;
                 }
-                if (Insert(obj, position - 1) != null)
+                if (Insert(obj, position - 1) != -1)
                 {
-                    return arr[position - 1];
+                    return position;
                 }
             }
-            return null;
+            return -1;
         }
 
         public T? Remove(int position)
diff --git a/HoistingCrane/HoistingCrane/FormCarCollection.cs b/HoistingCrane/HoistingCrane/FormCarCollection.cs
index 4d1678b..3dc984a 100644
--- a/HoistingCrane/HoistingCrane/FormCarCollection.cs
+++ b/HoistingCrane/HoistingCrane/FormCarCollection.cs
@@ -52,7 +52,7 @@ namespace HoistingCrane
                 default:
                     return;
             }
-            if ((_company + drawning) != null)
+            if ((_company + drawning) != -1)
             {
                 MessageBox.Show("Объект добавлен");
                 pictureBox.Image = _company.Show();