diff --git a/tseremonnikovaaa/task 1/docs/data/main.py b/tseremonnikovaaa/task 1/docs/data/main.py
new file mode 100644
index 0000000..c99316b
--- /dev/null
+++ b/tseremonnikovaaa/task 1/docs/data/main.py	
@@ -0,0 +1,56 @@
+import time
+import random
+import csv
+import sys
+import matplotlib.pyplot as plt
+import numpy as np
+
+sys.setrecursionlimit(20000)
+
+REPEATS = 5
+N = 10000
+def ll_insert(head, name, phone):
+    current = head
+    prev = None
+    while current is not None:
+        if current['name'] == name:
+            current['phone'] = phone
+            return head
+        prev = current
+        current = current['next']
+    new_node = {'name': name, 'phone': phone, 'next': None}
+    if prev is None:
+        return new_node
+    else:
+        prev['next'] = new_node
+        return head
+
+def ll_find(head, name):
+    current = head
+    while current is not None:
+        if current['name'] == name:
+            return current['phone']
+        current = current['next']
+    return None
+
+def ll_delete(head, name):
+    if head is None:
+        return None
+    if head['name'] == name:
+        return head['next']
+    current = head
+    while current['next'] is not None:
+        if current['next']['name'] == name:
+            current['next'] = current['next']['next']
+            return head
+        current = current['next']
+    return head
+
+def ll_collect_all(head):
+    records = []
+    current = head
+    while current is not None:
+        records.append((current['name'], current['phone']))
+        current = current['next']
+    records.sort(key=lambda x: x[0])
+    return records