forked from UNN/2026-rff_mp
Merge pull request '[1] task 1' (#258) from groshevava/2026-rff_mp:groshevava into develop
Reviewed-on: UNN/2026-rff_mp#258
This commit is contained in:
commit
93fb15f301
153
groshevava/docs/data/bst.py
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153
groshevava/docs/data/bst.py
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#реализация справочника на основе бинарного дерева поиска (BST).
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#создаём узел
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def bst_create_node(name, phone):
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return {
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'name': name,
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'phone': phone,
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'left': None,
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'right': None
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}
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#Вставляет запись в BST или обновляет.Возвращает корень дерева
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def bst_insert(root, name, phone):
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new_node = bst_create_node(name, phone)
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if root is None:
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return new_node
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current = root
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parent = None
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while current is not None:
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parent = current
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if name < current['name']:
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current = current['left']
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elif name > current['name']:
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current = current['right']
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else:
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current['phone'] = phone
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return root
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#вставляем новый узел
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if name < parent['name']:
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parent['left'] = new_node
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else:
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parent['right'] = new_node
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return root
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#ищет запись в BST по имени. Возвращает телефон или None
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def bst_find(root, name):
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current = root
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while current is not None:
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if name == current['name']:
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return current['phone']
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elif name < current['name']:
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current = current['left']
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else:
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current = current['right']
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return None
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#Находит узел с минимальным значением
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def _bst_find_min(node):
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current = node
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while current['left'] is not None:
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current = current['left']
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return current
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#удаляет запись из BST по имени. Возвращает новый корень дерева
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def bst_delete(root, name):
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if root is None:
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return None
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parent = None
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current = root
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while current is not None and current['name'] != name:
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parent = current
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if name < current['name']:
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current = current['left']
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else:
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current = current['right']
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if current is None:
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return root
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if current['left'] is None and current['right'] is None:
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if parent is None:
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return None
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elif parent['left'] == current:
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parent['left'] = None
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else:
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parent['right'] = None
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return root
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if current['left'] is None:
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if parent is None:
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return current['right']
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elif parent['left'] == current:
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parent['left'] = current['right']
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else:
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parent['right'] = current['right']
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return root
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if current['right'] is None:
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if parent is None:
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return current['left']
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elif parent['left'] == current:
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parent['left'] = current['left']
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else:
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parent['right'] = current['left']
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return root
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successor_parent = current
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successor = current['right']
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while successor['left'] is not None:
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successor_parent = successor
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successor = successor['left']
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current['name'] = successor['name']
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current['phone'] = successor['phone']
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if successor_parent == current:
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successor_parent['right'] = successor['right']
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else:
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successor_parent['left'] = successor['right']
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return root
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#рекурсивно собирает записи дерева по возрастанию имён
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def _bst_in_order_collect(node, records):
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if node is not None:
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_bst_in_order_collect(node['left'], records)
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records.append((node['name'], node['phone']))
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_bst_in_order_collect(node['right'], records)
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#отсортированный список всех записей
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def bst_list_all(root):
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records = []
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# Для очень глубоких деревьев лучше использовать итеративный обход
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_bst_in_order_iterative(root, records)
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return records
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#центрированный обход дерева.
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def _bst_in_order_iterative(root, records):
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stack = []
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current = root
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while current is not None or len(stack) > 0:
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# доходим до самого левого узла
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while current is not None:
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stack.append(current)
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current = current['left']
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# обрабатываем узел
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current = stack.pop()
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records.append((current['name'], current['phone']))
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#переходим к правому поддереву
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current = current['right']
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198
groshevava/docs/data/experiments.py
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198
groshevava/docs/data/experiments.py
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#проведение экспериментов и замер производительности
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import time
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import random
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import csv
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from linked_list import ll_insert, ll_find, ll_delete, ll_list_all
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from hash_table import ht_create, ht_insert, ht_find, ht_delete, ht_list_all
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from bst import bst_insert, bst_find, bst_delete, bst_list_all
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#генерирует записи справочника. shuffled- случайный порядок, sorted-отсортированный по имени
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def generate_test_data(n=10000, seed=42):
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random.seed(seed)
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names = [f"User_{i:05d}" for i in range(n)]
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phones = [f"+7-999-{i:07d}" for i in range(n)]
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records = list(zip(names, phones))
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records_shuffled = records.copy()
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random.shuffle(records_shuffled)
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records_sorted = sorted(records, key=lambda x: x[0])
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return records_shuffled, records_sorted
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#замеряем время
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def measure_insert(ll_structure, ht_structure, bst_structure, records, mode_name):
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results = []
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# Связный список
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start = time.perf_counter()
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head = None
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for name, phone in records:
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head = ll_insert(head, name, phone)
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end = time.perf_counter()
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results.append(["LinkedList", mode_name, "вставка", end - start])
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# Хеш-таблица
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start = time.perf_counter()
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buckets = ht_create(256)
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for name, phone in records:
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ht_insert(buckets, name, phone)
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end = time.perf_counter()
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results.append(["HashTable", mode_name, "вставка", end - start])
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# BST
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start = time.perf_counter()
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root = None
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for name, phone in records:
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root = bst_insert(root, name, phone)
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end = time.perf_counter()
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results.append(["BST", mode_name, "вставка", end - start])
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return results, head, buckets, root
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def measure_find(head, buckets, root, all_names, mode_name):
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results = []
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# Выбираем 100 случайных существующих и 10 несуществующих имён
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existing_names = random.sample(all_names, 100)
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non_existing_names = [f"None_{i}" for i in range(10)]
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search_names = existing_names + non_existing_names
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# Связный список
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start = time.perf_counter()
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for name in search_names:
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ll_find(head, name)
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end = time.perf_counter()
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results.append(["LinkedList", mode_name, "поиск", end - start])
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# Хеш-таблица
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start = time.perf_counter()
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for name in search_names:
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ht_find(buckets, name)
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end = time.perf_counter()
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results.append(["HashTable", mode_name, "поиск", end - start])
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# BST
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start = time.perf_counter()
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for name in search_names:
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bst_find(root, name)
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end = time.perf_counter()
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results.append(["BST", mode_name, "поиск", end - start])
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return results
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def measure_delete(head, buckets, root, all_names, mode_name):
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results = []
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# Выбираем 50 случайных имён для удаления
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delete_names = random.sample(all_names, 50)
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# Связный список
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start = time.perf_counter()
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for name in delete_names:
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head = ll_delete(head, name)
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end = time.perf_counter()
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results.append(["LinkedList", mode_name, "удаление", end - start])
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# Хеш-таблица
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start = time.perf_counter()
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for name in delete_names:
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ht_delete(buckets, name)
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end = time.perf_counter()
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results.append(["HashTable", mode_name, "удаление", end - start])
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# BST
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start = time.perf_counter()
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for name in delete_names:
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root = bst_delete(root, name)
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end = time.perf_counter()
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results.append(["BST", mode_name, "удаление", end - start])
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return results
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#проводим эксперименты
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def run_experiments(records_shuffled, records_sorted, repetitions=5):
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all_results = [
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["Структура", "Режим", "Операция", "Время (сек)"]
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]
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all_names = [record[0] for record in records_shuffled]
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for rep in range(repetitions):
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print(f"Повторение {rep + 1}/{repetitions}")
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# Шаффлированные данные
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results, head, buckets, root = measure_insert(
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None, None, None, records_shuffled, "случайный"
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)
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all_results.extend(results)
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results = measure_find(head, buckets, root, all_names, "случайный")
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all_results.extend(results)
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results = measure_delete(head, buckets, root, all_names, "случайный")
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all_results.extend(results)
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# Отсортированные данные
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results, head, buckets, root = measure_insert(
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None, None, None, records_sorted, "отсортированный"
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)
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all_results.extend(results)
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results = measure_find(head, buckets, root, all_names, "отсортированный")
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all_results.extend(results)
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results = measure_delete(head, buckets, root, all_names, "отсортированный")
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all_results.extend(results)
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return all_results
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def save_results(results, filename="results.csv"):
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with open(filename, 'w', newline='', encoding='utf-8') as f:
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writer = csv.writer(f)
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writer.writerows(results)
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print(f"Результаты сохранены в {filename}")
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def analyze_results(filename="results.csv"):
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from collections import defaultdict
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with open(filename, 'r', encoding='utf-8') as f:
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reader = csv.reader(f)
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next(reader) # пропускаем заголовок
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data = list(reader)
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# Группируем для вычисления средних
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stats = defaultdict(list)
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for row in data:
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structure, mode, operation, time_str = row
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key = (structure, mode, operation)
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stats[key].append(float(time_str))
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print("\nСредние времена выполнения (сек):")
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print("-" * 60)
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print(f"{'Структура':<15} {'Режим':<20} {'Операция':<10} {'Время':<10}")
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print("-" * 60)
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for (structure, mode, operation), times in sorted(stats.items()):
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avg_time = sum(times) / len(times)
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print(f"{structure:<15} {mode:<20} {operation:<10} {avg_time:<10.6f}")
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if __name__ == "__main__":
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print("Генерация тестовых данных...")
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records_shuffled, records_sorted = generate_test_data(10000)
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print("Запуск экспериментов...")
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results = run_experiments(records_shuffled, records_sorted, repetitions=5)
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save_results(results)
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|
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analyze_results()
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43
groshevava/docs/data/hash_table.py
Normal file
43
groshevava/docs/data/hash_table.py
Normal file
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@ -0,0 +1,43 @@
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#Телефонного справочник на основе хеш-таблицы.
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#Использует метод цепочек
|
||||||
|
|
||||||
|
from linked_list import ll_insert, ll_find, ll_delete, ll_list_all
|
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|
|
||||||
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#Хеш-функция для строки имени.
|
||||||
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#Использует полиномиальное хеширование.
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def ht_hash(name, bucket_count):
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|
hash_value = 0
|
||||||
|
p = 31
|
||||||
|
for char in name:
|
||||||
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hash_value = (hash_value * p + ord(char)) % bucket_count
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return hash_value
|
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|
|
||||||
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#Создаёт пустую таблицу
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|
def ht_create(bucket_count=128):
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|
return [None] * bucket_count
|
||||||
|
|
||||||
|
#Добавляет запись в таблицу.
|
||||||
|
#Вычисляет хэш, затем вставляет в нужный бакет.
|
||||||
|
def ht_insert(buckets, name, phone):
|
||||||
|
index = ht_hash(name, len(buckets))
|
||||||
|
buckets[index] = ll_insert(buckets[index], name, phone)
|
||||||
|
|
||||||
|
#ищет запись в таблице
|
||||||
|
def ht_find(buckets, name):
|
||||||
|
index = ht_hash(name, len(buckets))
|
||||||
|
return ll_find(buckets[index], name)
|
||||||
|
|
||||||
|
#удаляет запись
|
||||||
|
def ht_delete(buckets, name):
|
||||||
|
index = ht_hash(name, len(buckets))
|
||||||
|
buckets[index] = ll_delete(buckets[index], name)
|
||||||
|
|
||||||
|
#сортировка по имени
|
||||||
|
def ht_list_all(buckets):
|
||||||
|
all_records = []
|
||||||
|
for bucket_head in buckets:
|
||||||
|
records = ll_list_all(bucket_head)
|
||||||
|
all_records.extend(records)
|
||||||
|
|
||||||
|
all_records.sort(key=lambda x: x[0])
|
||||||
|
return all_records
|
||||||
64
groshevava/docs/data/linked_list.py
Normal file
64
groshevava/docs/data/linked_list.py
Normal file
|
|
@ -0,0 +1,64 @@
|
||||||
|
#Телефонного справочник - связный список
|
||||||
|
|
||||||
|
#создаёт новый узел
|
||||||
|
def ll_create_node(name, phone):
|
||||||
|
return {'name': name, 'phone': phone, 'next': None}
|
||||||
|
|
||||||
|
#добавляет запись в конец списка или обновляет.
|
||||||
|
def ll_insert(head, name, phone):
|
||||||
|
new_node = ll_create_node(name, phone)
|
||||||
|
|
||||||
|
if head is None:
|
||||||
|
return new_node
|
||||||
|
|
||||||
|
if head['name'] == name:
|
||||||
|
new_node['next'] = head['next']
|
||||||
|
return new_node
|
||||||
|
|
||||||
|
current = head
|
||||||
|
while current['next'] is not None:
|
||||||
|
if current['next']['name'] == name:
|
||||||
|
new_node['next'] = current['next']['next']
|
||||||
|
current['next'] = new_node
|
||||||
|
return head
|
||||||
|
current = current['next']
|
||||||
|
|
||||||
|
current['next'] = new_node
|
||||||
|
return head
|
||||||
|
|
||||||
|
#ищет запись по имени
|
||||||
|
def ll_find(head, name):
|
||||||
|
current = head
|
||||||
|
while current is not None:
|
||||||
|
if current['name'] == name:
|
||||||
|
return current['phone']
|
||||||
|
current = current['next']
|
||||||
|
return None
|
||||||
|
|
||||||
|
#удаляет запись из связного списка
|
||||||
|
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
|
||||||
|
|
||||||
|
#собирает все записи связного списка в список name-phone, сортирует по имени
|
||||||
|
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
|
||||||
91
groshevava/docs/data/results.csv
Normal file
91
groshevava/docs/data/results.csv
Normal file
|
|
@ -0,0 +1,91 @@
|
||||||
|
Структура,Режим,Операция,Время (сек)
|
||||||
|
LinkedList,случайный,вставка,7.0379601
|
||||||
|
HashTable,случайный,вставка,0.06370939999999958
|
||||||
|
BST,случайный,вставка,0.027558299999999925
|
||||||
|
LinkedList,случайный,поиск,0.05380779999999952
|
||||||
|
HashTable,случайный,поиск,0.0008359000000002226
|
||||||
|
BST,случайный,поиск,0.00036180000000030077
|
||||||
|
LinkedList,случайный,удаление,0.03279429999999994
|
||||||
|
HashTable,случайный,удаление,0.00046319999999955286
|
||||||
|
BST,случайный,удаление,0.0002371000000005452
|
||||||
|
LinkedList,отсортированный,вставка,6.794934100000001
|
||||||
|
HashTable,отсортированный,вставка,0.06352280000000121
|
||||||
|
BST,отсортированный,вставка,6.0836668
|
||||||
|
LinkedList,отсортированный,поиск,0.06371549999999715
|
||||||
|
HashTable,отсортированный,поиск,0.0013053000000020631
|
||||||
|
BST,отсортированный,поиск,0.05756839999999741
|
||||||
|
LinkedList,отсортированный,удаление,0.038222600000000995
|
||||||
|
HashTable,отсортированный,удаление,0.0011298000000010688
|
||||||
|
BST,отсортированный,удаление,0.036374399999999696
|
||||||
|
LinkedList,случайный,вставка,7.183893999999999
|
||||||
|
HashTable,случайный,вставка,0.06642779999999959
|
||||||
|
BST,случайный,вставка,0.025029599999999874
|
||||||
|
LinkedList,случайный,поиск,0.05042710000000028
|
||||||
|
HashTable,случайный,поиск,0.0008175000000001376
|
||||||
|
BST,случайный,поиск,0.00032500000000013074
|
||||||
|
LinkedList,случайный,удаление,0.04681619999999853
|
||||||
|
HashTable,случайный,удаление,0.0006166999999983602
|
||||||
|
BST,случайный,удаление,0.0002557000000003029
|
||||||
|
LinkedList,отсортированный,вставка,7.153371900000003
|
||||||
|
HashTable,отсортированный,вставка,0.05732309999999785
|
||||||
|
BST,отсортированный,вставка,6.7899777999999955
|
||||||
|
LinkedList,отсортированный,поиск,0.1498364000000052
|
||||||
|
HashTable,отсортированный,поиск,0.0021344999999968195
|
||||||
|
BST,отсортированный,поиск,0.08021600000000007
|
||||||
|
LinkedList,отсортированный,удаление,0.04531419999999997
|
||||||
|
HashTable,отсортированный,удаление,0.0005183999999971434
|
||||||
|
BST,отсортированный,удаление,0.032904900000005455
|
||||||
|
LinkedList,случайный,вставка,7.787066500000002
|
||||||
|
HashTable,случайный,вставка,0.06794790000000006
|
||||||
|
BST,случайный,вставка,0.028658900000003484
|
||||||
|
LinkedList,случайный,поиск,0.055633000000000266
|
||||||
|
HashTable,случайный,поиск,0.0011372000000022808
|
||||||
|
BST,случайный,поиск,0.00041319999999700485
|
||||||
|
LinkedList,случайный,удаление,0.04464529999999911
|
||||||
|
HashTable,случайный,удаление,0.0006264000000015812
|
||||||
|
BST,случайный,удаление,0.00025480000000044356
|
||||||
|
LinkedList,отсортированный,вставка,7.047079400000001
|
||||||
|
HashTable,отсортированный,вставка,0.07149469999999525
|
||||||
|
BST,отсортированный,вставка,6.004278499999998
|
||||||
|
LinkedList,отсортированный,поиск,0.059245700000005286
|
||||||
|
HashTable,отсортированный,поиск,0.0008623000000014258
|
||||||
|
BST,отсортированный,поиск,0.061085500000004345
|
||||||
|
LinkedList,отсортированный,удаление,0.038738300000005665
|
||||||
|
HashTable,отсортированный,удаление,0.00047229999999842676
|
||||||
|
BST,отсортированный,удаление,0.03476669999999871
|
||||||
|
LinkedList,случайный,вставка,7.814853800000002
|
||||||
|
HashTable,случайный,вставка,0.06793270000000007
|
||||||
|
BST,случайный,вставка,0.026476199999990513
|
||||||
|
LinkedList,случайный,поиск,0.056167000000002076
|
||||||
|
HashTable,случайный,поиск,0.0007876000000095473
|
||||||
|
BST,случайный,поиск,0.0003126000000008844
|
||||||
|
LinkedList,случайный,удаление,0.042319900000009625
|
||||||
|
HashTable,случайный,удаление,0.000520099999988588
|
||||||
|
BST,случайный,удаление,0.00023889999999937572
|
||||||
|
LinkedList,отсортированный,вставка,7.297540700000013
|
||||||
|
HashTable,отсортированный,вставка,0.06405399999999872
|
||||||
|
BST,отсортированный,вставка,6.252882799999995
|
||||||
|
LinkedList,отсортированный,поиск,0.058841400000005706
|
||||||
|
HashTable,отсортированный,поиск,0.0008604000000076439
|
||||||
|
BST,отсортированный,поиск,0.05284110000000908
|
||||||
|
LinkedList,отсортированный,удаление,0.03360689999999522
|
||||||
|
HashTable,отсортированный,удаление,0.00047010000000113905
|
||||||
|
BST,отсортированный,удаление,0.02865070000000003
|
||||||
|
LinkedList,случайный,вставка,7.937439900000001
|
||||||
|
HashTable,случайный,вставка,0.06798210000000893
|
||||||
|
BST,случайный,вставка,0.042214500000000044
|
||||||
|
LinkedList,случайный,поиск,0.0645776000000069
|
||||||
|
HashTable,случайный,поиск,0.0007535999999959131
|
||||||
|
BST,случайный,поиск,0.0003451000000040949
|
||||||
|
LinkedList,случайный,удаление,0.04297359999999628
|
||||||
|
HashTable,случайный,удаление,0.0005001999999905138
|
||||||
|
BST,случайный,удаление,0.00021639999999933934
|
||||||
|
LinkedList,отсортированный,вставка,7.474806200000003
|
||||||
|
HashTable,отсортированный,вставка,0.06952760000000069
|
||||||
|
BST,отсортированный,вставка,6.475523199999998
|
||||||
|
LinkedList,отсортированный,поиск,0.054521199999996384
|
||||||
|
HashTable,отсортированный,поиск,0.0008888999999925318
|
||||||
|
BST,отсортированный,поиск,0.049161900000001424
|
||||||
|
LinkedList,отсортированный,удаление,0.03957100000000935
|
||||||
|
HashTable,отсортированный,удаление,0.0004850999999916894
|
||||||
|
BST,отсортированный,удаление,0.03728519999999946
|
||||||
|
BIN
groshevava/docs/task_1.doc
Normal file
BIN
groshevava/docs/task_1.doc
Normal file
Binary file not shown.
Loading…
Reference in New Issue
Block a user