[0] initial commit

MininaVD/docs/data/Laba1dop.txt

@@ -76,4 +76,131 @@ print("\n6. Пробуем удалить несуществующую запи
 head = ll_delete(head, "Некто")
 ll_print_all(head)               
 
+Hash Function:
 
+def hash_function(name, table_size):
+    return sum(ord(c) for c in name) % table_size
+
+
+def ht_create(size=1000):
+    return [None] * size
+
+
+def ht_insert(buckets, name, phone):
+    size = len(buckets)
+    index = hash_function(name, size)
+    buckets[index] = ll_insert(buckets[index], name, phone)
+
+
+def ht_find(buckets, name):
+    size = len(buckets)
+    index = hash_function(name, size)
+    return ll_find(buckets[index], name)
+
+
+def ht_delete(buckets, name):
+    size = len(buckets)
+    index = hash_function(name, size)
+    buckets[index] = ll_delete(buckets[index], name)
+
+
+def ht_list_all(buckets):
+    records = []
+    for bucket in buckets:
+        current = bucket
+        while current is not None:
+            records.append((current['name'], current['phone']))
+            current = current['next']
+    records.sort(key=lambda x: x[0])
+    return records
+
+Tree function:
+
+def bst_insert(root, name, phone):
+    
+    if root is None:
+        return {'name': name, 'phone': phone, 'left': None, 'right': None}
+    
+    if name < root['name']:
+        root['left'] = bst_insert(root['left'], name, phone)
+    elif name > root['name']:
+        root['right'] = bst_insert(root['right'], name, phone)
+    else:
+        root['phone'] = phone
+    
+    return root
+
+
+def bst_find(root, name):
+    
+    current = root
+    while current is not None:
+        if name == current['name']:
+            return current['phone']
+        elif name < current['name']:
+            current = current['left']
+        else:
+            current = current['right']
+    return None
+
+
+def bst_find_min(node):
+    
+    current = node
+    while current['left'] is not None:
+        current = current['left']
+    return current
+
+
+def bst_delete(root, name):
+    
+    if root is None:
+        return None
+    
+    if name < root['name']:
+        root['left'] = bst_delete(root['left'], name)
+    elif name > root['name']:
+        root['right'] = bst_delete(root['right'], name)
+    else:
+        if root['left'] is None:
+            return root['right']
+        elif root['right'] is None:
+            return root['left']
+        
+        min_node = bst_find_min(root['right'])
+        root['name'] = min_node['name']
+        root['phone'] = min_node['phone']
+        root['right'] = bst_delete(root['right'], min_node['name'])
+    
+    return root
+
+
+def bst_list_all(root):
+    
+    records = []
+    
+    def inorder_traversal(node):
+        if node is not None:
+            inorder_traversal(node['left'])
+            records.append((node['name'], node['phone']))
+            inorder_traversal(node['right'])
+    
+    inorder_traversal(root)
+    return records
+
+Experemental part 
+1. Test data generation 
+
+def generate_records(count=10000):
+    
+    records = []
+    for i in range(count):
+        name = f"User_{i:05d}"
+        phone = f"+7-{random.randint(100,999)}-{random.randint(100,999)}-{random.randint(1000,9999)}"
+        records.append((name, phone))
+    
+    shuffled = records.copy()
+    random.shuffle(shuffled)
+    sorted_records = sorted(records, key=lambda x: x[0])
+    
+    return shuffled, sorted_records