last lab

labPython/lab16/data.txt

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+10
+70 65 39 94 8 16 22 58 63 15

labPython/lab16/task_1.py

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+class Node:
+    def __init__(self, data, next=None):
+        self.data = data
+        self.next = next
+
+
+def push(top, d):
+    return Node(d, top)
+
+
+def print_stack(top):
+    cur = top
+    while cur:
+        print(cur.data, end=" ")
+        cur = cur.next
+    print()
+
+
+top = None
+
+while True:
+    try:
+        print("\n1 - создать стек")
+        print("2 - добавить элемент")
+        print("3 - показать стек")
+        print("0 - выход")
+        c = input(">> ")
+
+        if c == "1":
+            top = None
+            arr = list(map(int, input("Введите числа: ").split()))
+            for x in arr:
+                top = push(top, x)
+        elif c == "2":
+            d = int(input("Введите D: "))
+            top = push(top, d)
+            print("Новая вершина:", top.data if top else None)
+        elif c == "3":
+            print_stack(top)
+        elif c == "0":
+            break
+    except:
+        print("Ошибка ввода")
+

labPython/lab16/task_2.py

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+class Node:
+    def __init__(self, data):
+        self.data = data
+        self.next = None
+
+
+def enqueue(head, tail, d):
+    node = Node(d)
+    if not head:
+        return node, node
+    tail.next = node
+    return head, node
+
+
+def merge(h1, h2):
+    if not h1:
+        return h2
+    if not h2:
+        return h1
+
+    if h1.data < h2.data:
+        head = h1
+        h1 = h1.next
+    else:
+        head = h2
+        h2 = h2.next
+
+    cur = head
+
+    while h1 and h2:
+        if h1.data < h2.data:
+            cur.next = h1
+            h1 = h1.next
+        else:
+            cur.next = h2
+            h2 = h2.next
+        cur = cur.next
+
+    cur.next = h1 if h1 else h2
+    return head
+
+
+def print_q(h):
+    while h:
+        print(h.data, end=" ")
+        h = h.next
+    print()
+
+
+h1 = t1 = None
+h2 = t2 = None
+
+while True:
+    try:
+        print("\n1 - создать очередь 1")
+        print("2 - создать очередь 2")
+        print("3 - объединить")
+        print("0 - выход")
+        c = input(">> ")
+
+        if c == "1":
+            h1 = t1 = None
+            for x in map(int, input().split()):
+                h1, t1 = enqueue(h1, t1, x)
+        elif c == "2":
+            h2 = t2 = None
+            for x in map(int, input().split()):
+                h2, t2 = enqueue(h2, t2, x)
+        elif c == "3":
+            res = merge(h1, h2)
+            print_q(res)
+        elif c == "0":
+            break
+    except:
+        print("Ошибка")

labPython/lab16/task_3.py

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+class Node:
+    def __init__(self, data):
+        self.data = data
+        self.next = None
+
+
+def build(arr):
+    head = None
+    for x in reversed(arr):
+        node = Node(x)
+        node.next = head
+        head = node
+    return head
+
+
+def find_second(head):
+    count = 0
+    while head:
+        if head.data % 6 == 0:
+            count += 1
+            if count == 2:
+                return head
+        head = head.next
+    return None
+
+
+while True:
+    try:
+        print("\n1 - создать список")
+        print("2 - найти элемент")
+        print("0 - выход")
+        c = input(">> ")
+
+        if c == "1":
+            arr = list(map(int, input().split()))
+            head = build(arr)
+        elif c == "2":
+            res = find_second(head)
+            print(res.data if res else "nil")
+        elif c == "0":
+            break
+    except:
+        print("Ошибка")

labPython/lab16/task_4.py

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+class Node:
+    def __init__(self, data):
+        self.data = data
+        self.next = None
+
+
+def build(arr):
+    head = None
+    for x in reversed(arr):
+        node = Node(x)
+        node.next = head
+        head = node
+    return head
+
+
+def process(head, m):
+    if not head:
+        return head
+
+    dummy = Node(0)
+    dummy.next = head
+    prev = dummy
+    cur = head
+    i = 1
+
+    while cur:
+        if i % 2 == 0:
+            node = Node(m)
+            prev.next = node
+            node.next = cur
+            prev = cur
+            cur = cur.next
+            i += 1
+        else:
+            prev = cur
+            cur = cur.next
+            i += 1
+
+    return dummy.next
+
+
+def print_list(h):
+    while h:
+        print(h.data, end=" ")
+        h = h.next
+    print()
+
+
+def print_last_ref(h):
+    if not h:
+        print("None")
+        return
+    while h.next:
+        h = h.next
+    print(h)
+
+
+while True:
+    try:
+        print("\n1 - создать список")
+        print("2 - обработать")
+        print("3 - вывести ссылку на последний элемент")
+        print("0 - выход")
+        c = input(">> ")
+
+        if c == "1":
+            head = build(list(map(int, input().split())))
+        elif c == "2":
+            m = int(input("M: "))
+            head = process(head, m)
+            print_list(head)
+        elif c == "3":
+            print_last_ref(head)
+        elif c == "0":
+            break
+    except:
+        print("Ошибка")

labPython/lab16/task_5.py

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+# task: ListWork62 / Создание убывающего списка из файла
+
+import random
+
+
+class Node:
+    def __init__(self, data):
+        self.data = data
+        self.next = None
+
+
+def insert_desc(head, x):
+    node = Node(x)
+    if not head or x > head.data:
+        node.next = head
+        return node
+    cur = head
+    while cur.next and cur.next.data > x:
+        cur = cur.next
+    node.next = cur.next
+    cur.next = node
+    return head
+
+
+def print_list(h):
+    while h:
+        print(h.data, end=" ")
+        h = h.next
+    print()
+
+
+while True:
+    try:
+        print("\n1 - создать файл")
+        print("2 - обработать файл")
+        print("0 - выход")
+        c = input(">> ")
+
+        if c == "1":
+            n = int(input("N: "))
+            arr = [random.randint(1, 100) for _ in range(n)]
+            with open("data.txt", "w") as f:
+                f.write(str(n) + "\n")
+                f.write(" ".join(map(str, arr)))
+        elif c == "2":
+            with open("data.txt") as f:
+                n = int(f.readline())
+                arr = list(map(int, f.readline().split()))
+            head = None
+            for x in arr:
+                head = insert_desc(head, x)
+            print_list(head)
+        elif c == "0":
+            break
+    except:
+        print("Ошибка")