VildyaevAV/results.csv

@@ -0,0 +1,19 @@
+Structure,Mode,Operation,Time
+LinkedList,random,insert,2.179811800000607
+LinkedList,random,find,0.019349800000782125
+LinkedList,random,delete,0.01508280000052764
+LinkedList,sorted,insert,1.7312419000008958
+LinkedList,sorted,find,0.01827670000056969
+LinkedList,sorted,delete,0.01452439999775379
+HashTable,random,insert,0.13504540000212728
+HashTable,random,find,0.0014485000028798822
+HashTable,random,delete,0.0010058999978355132
+HashTable,sorted,insert,0.12148510000042734
+HashTable,sorted,find,0.0012095999991288409
+HashTable,sorted,delete,0.0008018999978958163
+BST,random,insert,0.016409800002293196
+BST,random,find,0.0001536999989184551
+BST,random,delete,9.40000027185306e-05
+BST,sorted,insert,15.077545899999677
+BST,sorted,find,0.05779409999740892
+BST,sorted,delete,0.03522280000106548

VildyaevAV/task1.py

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+import random
+import time
+import csv
+import sys
+sys.setrecursionlimit(30000)
+
+
+# =========================
+# LINKED LIST
+# =========================
+
+def ll_insert(head, name, phone):
+    current = head
+
+    while current:
+        if current["name"] == name:
+            current["phone"] = phone
+            return head
+        current = current["next"]
+
+    new_node = {
+        "name": name,
+        "phone": phone,
+        "next": head
+    }
+
+    return new_node
+
+
+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)
+
+
+# =========================
+# HASH TABLE
+# =========================
+
+TABLE_SIZE = 1000
+
+
+def hash_func(name):
+    return sum(ord(c) for c in name) % TABLE_SIZE
+
+
+def ht_insert(buckets, name, phone):
+    index = hash_func(name)
+    buckets[index] = ll_insert(buckets[index], name, phone)
+
+
+def ht_find(buckets, name):
+    index = hash_func(name)
+    return ll_find(buckets[index], name)
+
+
+def ht_delete(buckets, name):
+    index = hash_func(name)
+    buckets[index] = ll_delete(buckets[index], name)
+
+
+def ht_list_all(buckets):
+    result = []
+
+    for bucket in buckets:
+        result.extend(ll_list_all(bucket))
+
+    return sorted(result)
+
+
+# =========================
+# BST
+# =========================
+
+def bst_insert(root, name, phone):
+    if root is None:
+        return {
+            "name": name,
+            "phone": phone,
+            "left": None,
+            "right": None
+        }
+
+    if name < root["name"]:
+        root["left"] = bst_insert(root["left"], name, phone)
+
+    elif name > root["name"]:
+        root["right"] = bst_insert(root["right"], name, phone)
+
+    else:
+        root["phone"] = phone
+
+    return root
+
+
+def bst_find(root, name):
+    if root is None:
+        return None
+
+    if name == root["name"]:
+        return root["phone"]
+
+    if name < root["name"]:
+        return bst_find(root["left"], name)
+
+    return bst_find(root["right"], name)
+
+
+def bst_min(node):
+    current = node
+
+    while current["left"]:
+        current = current["left"]
+
+    return current
+
+
+def bst_delete(root, name):
+    if root is None:
+        return None
+
+    if name < root["name"]:
+        root["left"] = bst_delete(root["left"], name)
+
+    elif name > root["name"]:
+        root["right"] = bst_delete(root["right"], name)
+
+    else:
+        if root["left"] is None:
+            return root["right"]
+
+        if root["right"] is None:
+            return root["left"]
+
+        temp = bst_min(root["right"])
+
+        root["name"] = temp["name"]
+        root["phone"] = temp["phone"]
+
+        root["right"] = bst_delete(root["right"], temp["name"])
+
+    return root
+
+
+def bst_list_all(root):
+    if root is None:
+        return []
+
+    return (
+        bst_list_all(root["left"])
+        + [(root["name"], root["phone"])]
+        + bst_list_all(root["right"])
+    )
+
+
+# =========================
+# TEST DATA
+# =========================
+
+N = 10000
+
+records = [
+    (f"User_{i:05d}", str(random.randint(100000, 999999)))
+    for i in range(N)
+]
+
+records_shuffled = records[:]
+random.shuffle(records_shuffled)
+
+records_sorted = sorted(records)
+
+
+# =========================
+# BENCHMARK
+# =========================
+
+results = [
+    ["Structure", "Mode", "Operation", "Time"]
+]
+
+
+def benchmark_linked_list(records_input, mode):
+    global results
+
+    head = None
+
+    start = time.perf_counter()
+
+    for name, phone in records_input:
+        head = ll_insert(head, name, phone)
+
+    end = time.perf_counter()
+
+    results.append(["LinkedList", mode, "insert", end - start])
+
+    sample = random.sample(records_input, 100)
+
+    start = time.perf_counter()
+
+    for name, _ in sample:
+        ll_find(head, name)
+
+    end = time.perf_counter()
+
+    results.append(["LinkedList", mode, "find", end - start])
+
+    start = time.perf_counter()
+
+    for name, _ in sample[:50]:
+        head = ll_delete(head, name)
+
+    end = time.perf_counter()
+
+    results.append(["LinkedList", mode, "delete", end - start])
+
+
+def benchmark_hash_table(records_input, mode):
+    global results
+
+    buckets = [None] * TABLE_SIZE
+
+    start = time.perf_counter()
+
+    for name, phone in records_input:
+        ht_insert(buckets, name, phone)
+
+    end = time.perf_counter()
+
+    results.append(["HashTable", mode, "insert", end - start])
+
+    sample = random.sample(records_input, 100)
+
+    start = time.perf_counter()
+
+    for name, _ in sample:
+        ht_find(buckets, name)
+
+    end = time.perf_counter()
+
+    results.append(["HashTable", mode, "find", end - start])
+
+    start = time.perf_counter()
+
+    for name, _ in sample[:50]:
+        ht_delete(buckets, name)
+
+    end = time.perf_counter()
+
+    results.append(["HashTable", mode, "delete", end - start])
+
+
+def benchmark_bst(records_input, mode):
+    global results
+
+    root = None
+
+    start = time.perf_counter()
+
+    for name, phone in records_input:
+        root = bst_insert(root, name, phone)
+
+    end = time.perf_counter()
+
+    results.append(["BST", mode, "insert", end - start])
+
+    sample = random.sample(records_input, 100)
+
+    start = time.perf_counter()
+
+    for name, _ in sample:
+        bst_find(root, name)
+
+    end = time.perf_counter()
+
+    results.append(["BST", mode, "find", end - start])
+
+    start = time.perf_counter()
+
+    for name, _ in sample[:50]:
+        root = bst_delete(root, name)
+
+    end = time.perf_counter()
+
+    results.append(["BST", mode, "delete", end - start])
+
+
+# =========================
+# RUN TESTS
+# =========================
+
+benchmark_linked_list(records_shuffled, "random")
+benchmark_linked_list(records_sorted, "sorted")
+
+benchmark_hash_table(records_shuffled, "random")
+benchmark_hash_table(records_sorted, "sorted")
+
+benchmark_bst(records_shuffled, "random")
+benchmark_bst(records_sorted, "sorted")
+
+
+# =========================
+# SAVE CSV
+# =========================
+
+with open("results.csv", "w", newline="") as f:
+    writer = csv.writer(f)
+    writer.writerows(results)
+
+print("Done! Results saved to results.csv")