[1] 1-st exersize LinkedListPhoneBook

SolovevDD/docs/data/1-st exersize/LinkedListPhoneBook.py

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+import time
+import random
+import csv
+import os
+import matplotlib.pyplot as plt
+
+def ll_insert(head, name, phone):
+    new_node = {'name': name, 'phone': phone, 'next': None}
+    if head is None:
+        return new_node
+    current = head
+    while current['next']:
+        current = current['next']
+    current['next'] = new_node
+    return head
+
+def ll_find(head, name):
+    current = head
+    while current:
+        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']:
+        if current['next']['name'] == name:
+            current['next'] = current['next']['next']
+            return head
+        current = current['next']
+    return head
+
+def ll_list_all(head):
+    result = []
+    current = head
+    while current:
+        result.append((current['name'], current['phone']))
+        current = current['next']
+    return sorted(result)
+
+def create_hash_table(size=200):
+    return [None] * size
+
+def ht_insert(buckets, name, phone):
+    index = hash(name) % len(buckets)
+    buckets[index] = ll_insert(buckets[index], name, phone)
+
+def ht_find(buckets, name):
+    index = hash(name) % len(buckets)
+    return ll_find(buckets[index], name)
+
+def ht_delete(buckets, name):
+    index = hash(name) % len(buckets)
+    buckets[index] = ll_delete(buckets[index], name)
+
+def ht_list_all(buckets):
+    result = []
+    for bucket in buckets:
+        current = bucket
+        while current:
+            result.append((current['name'], current['phone']))
+            current = current['next']
+    return sorted(result)
+
+
+def bst_insert(root, name, phone):
+    new_node = {'name': name, 'phone': phone, 'left': None, 'right': None}
+    
+    if root is None:
+        return new_node
+    
+    current = root
+    while True:
+        if name < current['name']:
+            if current['left'] is None:
+                current['left'] = new_node
+                return root
+            current = current['left']
+        elif name > current['name']:
+            if current['right'] is None:
+                current['right'] = new_node
+                return root
+            current = current['right']
+        else:
+            current['phone'] = phone
+            return root
+
+
+def bst_find(root, name):
+    current = root
+    while current:
+        if name == current['name']:
+            return current['phone']
+        elif name < current['name']:
+            current = current['left']
+        else:
+            current = current['right']
+    return None
+
+
+def bst_delete(root, name):
+    if root is None:
+        return None
+
+    parent = None
+    current = root
+    while current 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:
+        child = current['left'] if current['left'] else current['right']
+        if parent is None:
+            return child
+        if parent['left'] == current:
+            parent['left'] = child
+        else:
+            parent['right'] = child
+    else:
+        parent_min = current
+        min_node = current['right']
+        while min_node['left']:
+            parent_min = min_node
+            min_node = min_node['left']
+
+        current['name'] = min_node['name']
+        current['phone'] = min_node['phone']
+
+        if parent_min['left'] == min_node:
+            parent_min['left'] = min_node['right']
+        else:
+            parent_min['right'] = min_node['right']
+
+    return root
+
+
+def bst_list_all(root):
+    result = []
+    def inorder(node):
+        if node:
+            inorder(node['left'])
+            result.append((node['name'], node['phone']))
+            inorder(node['right'])
+    inorder(root)
+    return result
+
+
+def generate_records(n=10000):
+    records = [(f"User_{i:05d}", f"8{random.randint(9000000000, 9999999999)}") 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_experiments():
+    random.seed(42)
+    records_shuffled, records_sorted = generate_records(10000)
+    all_results = []
+
+    structures = ["LinkedList", "HashTable", "BST"]
+    modes = [("случайный", records_shuffled), ("отсортированный", records_sorted)]
+
+    for mode_name, records in modes:
+        for struct_name in structures:
+            print(f"Тестируем: {struct_name} | Режим: {mode_name}")
+
+            for run in range(5):  
+                if struct_name == "LinkedList":
+                    data = None
+                elif struct_name == "HashTable":
+                    data = create_hash_table(200)
+                else:  
+                    data = None
+
+                start = time.perf_counter()
+                for name, phone in records:
+                    if struct_name == "LinkedList":
+                        data = ll_insert(data, name, phone)
+                    elif struct_name == "HashTable":
+                        ht_insert(data, name, phone)
+                    else:
+                        data = bst_insert(data, name, phone)
+                insert_time = time.perf_counter() - start
+
+                test_names = [r[0] for r in random.sample(records, 100)]
+                test_names += [f"None_{i}" for i in range(10)]
+                start = time.perf_counter()
+                for name in test_names:
+                    if struct_name == "LinkedList":
+                        ll_find(data, name)
+                    elif struct_name == "HashTable":
+                        ht_find(data, name)
+                    else:
+                        bst_find(data, name)
+                find_time = time.perf_counter() - start
+
+                delete_names = [r[0] for r in random.sample(records, 50)]
+                start = time.perf_counter()
+                for name in delete_names:
+                    if struct_name == "LinkedList":
+                        data = ll_delete(data, name)
+                    elif struct_name == "HashTable":
+                        ht_delete(data, name)
+                    else:
+                        data = bst_delete(data, name)
+                delete_time = time.perf_counter() - start
+
+                all_results.append([struct_name, mode_name, "вставка", run + 1, insert_time])
+                all_results.append([struct_name, mode_name, "поиск", run + 1, find_time])
+                all_results.append([struct_name, mode_name, "удаление", run + 1, delete_time])
+
+    os.makedirs("docs/data", exist_ok=True)
+    filepath = "docs/data/results.csv"
+    with open(filepath, "w", newline="", encoding="utf-8") as f:
+        writer = csv.writer(f)
+        writer.writerow(["Структура", "Режим", "Операция", "Запуск", "Время (сек)"])
+        writer.writerows(all_results)
+
+    print(f"\nРезультаты сохранены в {filepath}")
+    return all_results
+