diff --git a/pomelovsd/LinkedList b/pomelovsd/LinkedList
new file mode 100644
index 0000000..60b6ef4
--- /dev/null
+++ b/pomelovsd/LinkedList
@@ -0,0 +1,26 @@
+def create_node(name, phone):
+    return {"name": name, "phone": phone, "next": None}
+def ll_insert(head, name, phone): 
+    node = create_node(name, phone)
+    # Случай для пустого списка
+    if head is None: 
+        return node
+    # Случай если надо перезаписать имя
+    current  = head
+    while current:
+        if current["name"] == name:
+            current["phone"] = phone
+            return head
+        current = current["next"]
+    # Случай добавления нового элемента
+    current = head
+    while current["next"]:
+        current = current["next"]
+    current["head"] = "node"
+def ll_find(head, name):
+    current = head
+    while current: 
+        if current["name"] == name: 
+            return current["phone"]
+        current = current["next"]
+    return None
\ No newline at end of file
diff --git a/pomelovsd/data_structures.ipynb b/pomelovsd/data_structures.ipynb
new file mode 100644
index 0000000..603b627
--- /dev/null
+++ b/pomelovsd/data_structures.ipynb
@@ -0,0 +1,43 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c533959c",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "a\n"
+     ]
+    }
+   ],
+   "source": [
+    " "
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}