diff --git a/KislyuninED/docks/data/1-st-exercize/main.py b/KislyuninED/docks/data/1-st-exercize/main.py
index 1b05cd1..be8b53e 100644
--- a/KislyuninED/docks/data/1-st-exercize/main.py
+++ b/KislyuninED/docks/data/1-st-exercize/main.py
@@ -47,6 +47,10 @@ def ll_list_all(head):
 
 
 
+
+
+
+
 # хеш-функция – сумма ord(name) % size
 def _hash(name, size):
     h = 0
@@ -81,4 +85,100 @@ def ht_list_all(buckets):
             all_records.append((curr['n'], curr['p']))
             curr = curr['nxt']
     all_records.sort(key=lambda x: x[0])
-    return all_records
\ No newline at end of file
+    return all_records
+
+
+
+
+
+
+
+
+# Узел дерева: {'n': имя, 'p': телефон, 'l': левый, 'r': правый}
+def bst_create_node(name, phone):
+    return {'n': name, 'p': phone, 'l': None, 'r': None}
+
+def bst_insert(root, name, phone):
+    if root is None:
+        return bst_create_node(name, phone)
+    # итеративная вставка (без рекурсии)
+    parent = None
+    cur = root
+    while cur:
+        parent = cur
+        if name == cur['n']:
+            cur['p'] = phone
+            return root
+        elif name < cur['n']:
+            cur = cur['l']
+        else:
+            cur = cur['r']
+    # вставляем как лист
+    if name < parent['n']:
+        parent['l'] = bst_create_node(name, phone)
+    else:
+        parent['r'] = bst_create_node(name, phone)
+    return root
+
+def bst_find(root, name):
+    cur = root
+    while cur:
+        if name == cur['n']:
+            return cur['p']
+        elif name < cur['n']:
+            cur = cur['l']
+        else:
+            cur = cur['r']
+    return None
+
+def _bst_min(node):
+    while node['l']:
+        node = node['l']
+    return node
+
+def bst_delete(root, name):
+    if root is None:
+        return None
+    # поиск узла и родителя
+    parent = None
+    cur = root
+    while cur and cur['n'] != name:
+        parent = cur
+        if name < cur['n']:
+            cur = cur['l']
+        else:
+            cur = cur['r']
+    if cur is None:
+        return root
+    # случай 0 или 1 ребёнок
+    if cur['l'] is None or cur['r'] is None:
+        child = cur['l'] if cur['l'] else cur['r']
+        if parent is None:
+            return child
+        if parent['l'] == cur:
+            parent['l'] = child
+        else:
+            parent['r'] = child
+    else:
+        # два ребёнка – ищем inorder-преемника
+        succ_parent = cur
+        succ = cur['r']
+        while succ['l']:
+            succ_parent = succ
+            succ = succ['l']
+        cur['n'], cur['p'] = succ['n'], succ['p']
+        if succ_parent['l'] == succ:
+            succ_parent['l'] = succ['r']
+        else:
+            succ_parent['r'] = succ['r']
+    return root
+
+def bst_list_all(root):
+    result = []
+    def inorder(node):
+        if node:
+            inorder(node['l'])
+            result.append((node['n'], node['p']))
+            inorder(node['r'])
+    inorder(root)
+    return result
\ No newline at end of file