diff --git a/lukovnikovde/docs/data/DataStructure.py b/lukovnikovde/docs/data/DataStructure.py
index 6c578c4..eb33ffb 100644
--- a/lukovnikovde/docs/data/DataStructure.py
+++ b/lukovnikovde/docs/data/DataStructure.py
@@ -1,4 +1,5 @@
 import random as rnd
+import time
 #############################################################################################
 
 def sort_list(name_list):
@@ -13,8 +14,10 @@ def hash_key(name):
     h_key = sum(ord(ch) for ch in name)
     return h_key
 
-    
-
+def create_name_phone(i):
+    name = f"User_{i:03d}"
+    phone = f"{rnd.randint(100, 999)}-{rnd.randint(100, 999)}"
+    return (name, phone)
 ###########################################################################################################################
 
 def ll_insert(head, name, phone):
@@ -74,42 +77,40 @@ def ll_list_all(head):
 ################################################################################################################################
 
 
-def LinkedList(head):
+def LinkedList(head, phone_book):
 
-    print('======== TESTING LL_INSERT ==========')
-    Name = ['Dima', 'Ivan', 'Maxim', 'Alex', 'Olga', 'Lena']
+    start_insert = time.perf_counter()
+    for i in range(len(phone_book)):
 
-    for _ in range(10):
-        name = Name[rnd.randint(0, len(Name) - 1)]
-        phone = str(rnd.randint(0,9)) + str(rnd.randint(0,9)) + str(rnd.randint(0,9)) + '-' + \
-                str(rnd.randint(0,9)) + str(rnd.randint(0,9)) + str(rnd.randint(0,9)) 
-        print(name, phone)
-        head = ll_insert(head, name, phone)
-        print(head)
-        print('-----------------------------------\n')
-    print('======== END TESTING ================\n\n')
+        head = ll_insert(head, phone_book[i][0], phone_book[i][1])
+    #print(head)
+    end_insert = time.perf_counter()
+    time_insert = end_insert - start_insert
 
-
-    print('======== TESTING LL_FIND ==========') 
-    Name.append('Masha')
-    for i in range(len(Name)):
-        name = Name[i]
-        print(name, ":", ll_find(head, name))
-    print("======== END TESTING =============\n\n")
-
-    print("============ TESTING LL_LIST_ALL  AND SORT_LIST =============")
-    print(*sort_list(ll_list_all(head)))
-    print("============ END TESTING ===============\n\n")
-
-    print('========== TESTING LL_DELETE ==========')
+    start_find = time.perf_counter()
+    for _ in range(100):
+        name = create_name_phone(rnd.randint(0, 999))[0]
+        #print(name, ":", ll_find(head, name))
+    end_find = time.perf_counter()
+    time_find = end_find - start_find
     
-    for _ in range(2):
-        name = Name[rnd.randint(0, 4)]
+    
+    start_delete = time.perf_counter()
+    for i in range(110):
+        if i <= 99: name = f"User_{rnd.randint(0,999):03d}"
+        else: name = f"None_{i:03d}"
         head = ll_delete(head, name)
-
-        print(head)
-        print(name, ":", ll_find(head, name))
-    print("========= END TESTING ==============\n\n")
+    end_delete = time.perf_counter()
+    time_delete = end_delete - start_delete
+        
+    
+    start_list = time.perf_counter()    
+    name_list = sort_list(ll_list_all(head))
+    #print(*name_list)
+    end_list = time.perf_counter()
+    time_list = end_list - start_list
+    
+    return (time_insert, time_find, time_delete, time_list)
 
 #########################################################################################################
 
@@ -248,8 +249,9 @@ def bst_list_all(root, name_list = []):
 def bst_delete(root, name):
     
     running = root
+    old_running = running
     
-    while running is not None:
+    while old_running is not None:
         node = hash_key(running['name'])
         sheet = hash_key(name)
         if name == running['name']:
@@ -265,6 +267,10 @@ def bst_delete(root, name):
             running = running['left']   
             
     step = ['left', 'right']        
+    
+    if running['left'] is None and running['right'] is None:
+        old_running = None
+        return root
             
     if running['left'] is None:
         old_running[step[flag]] = running['right']
@@ -335,9 +341,38 @@ def BinarySearchTree(root):
 ################################################################################################
 def main():
     
-    LinkedList(None)
-    HashTable([[] for _ in range(10)])
-    BinarySearchTree(None)
+    phone_book = []
+    for i in range(1000):
+        phone_book.append(create_name_phone(i))
+    for _ in range(9000):
+        phone_book.append(create_name_phone(rnd.randint(0, 999)))
+    
+    phone_book_not_sorted = phone_book.copy()
+    rnd.shuffle(phone_book_not_sorted)
+    
+    phone_book_sorted = phone_book.copy()
+    phone_book_sorted = sort_list(phone_book_sorted)
+    replay = 10
+    
+    
+    Time_ll_not_sorted = {'insert': 0, 'find': 0, 'delete': 0, 'list': 0}
+    Time_ll_sorted =  {'insert': 0, 'find': 0, 'delete': 0, 'list': 0}
+    
+    for _ in range(replay):
+        time_ll_not_sorted = LinkedList(None, phone_book_not_sorted)
+        for i, key in enumerate(Time_ll_not_sorted):
+            Time_ll_not_sorted[key] += time_ll_not_sorted[i]/replay
+    print(Time_ll_not_sorted)
+        
+    for _ in range(replay):
+        time_ll_sorted = LinkedList(None, phone_book_sorted)
+        for i, key in enumerate(Time_ll_sorted):
+            Time_ll_sorted[key] += time_ll_sorted[i]/replay
+    print(Time_ll_sorted)
+        
+        
+    #HashTable([[] for _ in range(10)])
+    #BinarySearchTree(None)
 
 if __name__ == "__main__":
     main()