diff --git a/agafonovdm/docs/data/1zad/1-st_ex.py b/agafonovdm/docs/data/1zad/1-st_ex.py
new file mode 100644
index 0000000..24c59b7
--- /dev/null
+++ b/agafonovdm/docs/data/1zad/1-st_ex.py
@@ -0,0 +1,292 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import time
+import random
+import csv
+import sys
+sys.setrecursionlimit(30000)
+
+def ll_create_node(name, phone):
+    return {'name': name, 'phone': phone, 'next': None}
+
+def ll_insert(head, name, phone):
+    if head is None:
+        return ll_create_node(name, phone)
+    
+    if head['name'] == name:
+        head['phone'] = phone
+        return head
+    
+    current = head
+    while current['next'] is not None:
+        if current['next']['name'] == name:
+            current['next']['phone'] = phone
+            return head
+        current = current['next']
+    
+    current['next'] = ll_create_node(name, phone)
+    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_list_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
+
+def hash_function(name, table_size):
+    return sum(ord(c) for c in name) % table_size
+
+def ht_create_table(size=2000):
+    return [None] * size
+
+def ht_insert(table, name, phone):
+    index = hash_function(name, len(table))
+    table[index] = ll_insert(table[index], name, phone)
+
+def ht_find(table, name):
+    index = hash_function(name, len(table))
+    return ll_find(table[index], name)
+
+def ht_delete(table, name):
+    index = hash_function(name, len(table))
+    table[index] = ll_delete(table[index], name)
+
+def ht_list_all(table):
+    all_records = []
+    for bucket in table:
+        if bucket is not None:
+            current = bucket
+            while current is not None:
+                all_records.append((current['name'], current['phone']))
+                current = current['next']
+    all_records.sort(key=lambda x: x[0])
+    return all_records
+
+def bst_create_node(name, phone):
+    return {'name': name, 'phone': phone, 'left': None, 'right': None}
+
+def bst_insert(root, name, phone):
+    if root is None:
+        return bst_create_node(name, phone)
+    
+    current = root
+    while True:
+        if name < current['name']:
+            if current['left'] is None:
+                current['left'] = bst_create_node(name, phone)
+                break
+            else:
+                current = current['left']
+        elif name > current['name']:
+            if current['right'] is None:
+                current['right'] = bst_create_node(name, phone)
+                break
+            else:
+                current = current['right']
+        else:
+            current['phone'] = phone
+            break
+    
+    return root
+
+def bst_find(root, name):
+    current = root
+    while current is not None:
+        if name < current['name']:
+            current = current['left']
+        elif name > current['name']:
+            current = current['right']
+        else:
+            return current['phone']
+    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
+    
+    parent = None
+    current = root
+    
+    while current is not None and current['name'] != name:
+        parent = current
+        if name < current['name']:
+            current = current['left']
+        else:
+            current = current['right']
+    
+    if current is None:
+        return root
+    
+    if current['left'] is None or current['right'] is None:
+        if current['left'] is not None:
+            child = current['left']
+        else:
+            child = current['right']
+        
+        if parent is None:
+            return child
+        
+        if parent['left'] == current:
+            parent['left'] = child
+        else:
+            parent['right'] = child
+    else:
+        successor_parent = current
+        successor = current['right']
+        
+        while successor['left'] is not None:
+            successor_parent = successor
+            successor = successor['left']
+        
+        current['name'] = successor['name']
+        current['phone'] = successor['phone']
+        
+        if successor_parent['left'] == successor:
+            successor_parent['left'] = successor['right']
+        else:
+            successor_parent['right'] = successor['right']
+    
+    return root
+
+def bst_list_all(root):
+    records = []
+    stack = []
+    current = root
+    
+    while stack or current is not None:
+        while current is not None:
+            stack.append(current)
+            current = current['left']
+        current = stack.pop()
+        records.append((current['name'], current['phone']))
+        current = current['right']
+    
+    return records
+
+def generate_data(n=10000):
+    records = [(f"User_{i:05d}", f"+7-999-{i:06d}") for i in range(n)]
+    records_shuffled = records.copy()
+    random.shuffle(records_shuffled)
+    records_sorted = sorted(records, key=lambda x: x[0])
+    return records_shuffled, records_sorted
+
+def run_experiment(structure_name, insert_func, find_func, delete_func, 
+                   list_all_func, init_func, records, n_find=100):
+    
+    data = init_func()
+    names = [r[0] for r in records]
+    
+    start = time.perf_counter()
+    for name, phone in records:
+        if structure_name == "HashTable":
+            insert_func(data, name, phone)
+        else:
+            data = insert_func(data, name, phone)
+    insert_time = time.perf_counter() - start
+    
+    find_names = random.sample(names, min(n_find, len(names)))
+    missing_names = [f"None_{i}" for i in range(10)]
+    all_find_names = find_names + missing_names
+    
+    start = time.perf_counter()
+    for name in all_find_names:
+        if structure_name == "HashTable":
+            find_func(data, name)
+        else:
+            find_func(data, name)
+    find_time = time.perf_counter() - start
+    
+    delete_names = random.sample(names, min(50, len(names)))
+    start = time.perf_counter()
+    for name in delete_names:
+        if structure_name == "HashTable":
+            delete_func(data, name)
+        else:
+            data = delete_func(data, name)
+    delete_time = time.perf_counter() - start
+    
+    return insert_time, find_time, delete_time
+
+def main():
+    print("Generating test data...")
+    records_shuffled, records_sorted = generate_data(10000)
+    
+    results = []
+    
+    structures = [
+        ("LinkedList", ll_insert, ll_find, ll_delete, ll_list_all, lambda: None),
+        ("HashTable", ht_insert, ht_find, ht_delete, ht_list_all, lambda: ht_create_table(2000)),
+        ("BST", bst_insert, bst_find, bst_delete, bst_list_all, lambda: None)
+    ]
+    
+    for mode_name, records in [("random", records_shuffled), ("sorted", records_sorted)]:
+        print(f"\nMode: {mode_name}")
+        
+        for struct_name, insert_f, find_f, delete_f, list_f, init_f in structures:
+            print(f"  Testing {struct_name}...")
+            
+            times = []
+            for run in range(5):
+                insert_t, find_t, delete_t = run_experiment(
+                    struct_name, insert_f, find_f, delete_f, list_f, init_f, records
+                )
+                times.append((insert_t, find_t, delete_t))
+                print(f"    Run {run+1}: insert={insert_t:.4f}s, find={find_t:.4f}s, delete={delete_t:.4f}s")
+            
+            avg_insert = sum(t[0] for t in times) / 5
+            avg_find = sum(t[1] for t in times) / 5
+            avg_delete = sum(t[2] for t in times) / 5
+            
+            results.append([struct_name, mode_name, "insert", avg_insert])
+            results.append([struct_name, mode_name, "find", avg_find])
+            results.append([struct_name, mode_name, "delete", avg_delete])
+    
+    with open("results.csv", "w", newline="", encoding="utf-8") as f:
+        writer = csv.writer(f)
+        writer.writerow(["Structure", "Mode", "Operation", "Time_seconds"])
+        writer.writerows(results)
+    
+    print("\n" + "="*60)
+    print("RESULTS (average over 5 runs):")
+    print("="*60)
+    for row in results:
+        print(f"{row[0]:12} | {row[1]:8} | {row[2]:8} | {row[3]:.6f} sec")
+    
+    print("\nResults saved to results.csv")
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file
diff --git a/agafonovdm/docs/data/1zad/results.csv b/agafonovdm/docs/data/1zad/results.csv
new file mode 100644
index 0000000..71a2199
--- /dev/null
+++ b/agafonovdm/docs/data/1zad/results.csv
@@ -0,0 +1,19 @@
+Structure,Mode,Operation,Time_seconds
+LinkedList,random,insert,3.115811080000276
+LinkedList,random,find,0.02396312000018952
+LinkedList,random,delete,0.016048219999720458
+HashTable,random,insert,0.18448304000012286
+HashTable,random,find,0.0012929600005008978
+HashTable,random,delete,0.0009329200001957361
+BST,random,insert,0.017231119999996734
+BST,random,find,0.00014155999961076304
+BST,random,delete,9.299999983340968e-05
+LinkedList,sorted,insert,2.780292439999903
+LinkedList,sorted,find,0.02136590000045544
+LinkedList,sorted,delete,0.014907859999584615
+HashTable,sorted,insert,0.16707750000023225
+HashTable,sorted,find,0.0012113199998566415
+HashTable,sorted,delete,0.0008899600001313956
+BST,sorted,insert,3.844869280000421
+BST,sorted,find,0.031808019999880345
+BST,sorted,delete,0.016554539999560802