Create heapsort_linkedlist.py

Author: Alisha-786

Sorting Algorithims/heapsort_linkedlist.py

@@ -0,0 +1,82 @@
+class Node:
+    def __init__(self, data):
+        self.data = data
+        self.next = None
+
+class LinkedList:
+    def __init__(self):
+        self.head = None
+
+    def push(self, data):
+        new_node = Node(data)
+        new_node.next = self.head
+        self.head = new_node
+
+    def print_list(self):
+        current = self.head
+        while current:
+            print(current.data, end=" -> ")
+            current = current.next
+        print("None")
+
+    def heapify(self, n, i):
+        largest = i
+        left = 2 * i + 1
+        right = 2 * i + 2
+
+        current = self.head
+        for _ in range(i):
+            current = current.next
+
+        if left < n and current.data < current.next.data:
+            largest = left
+
+        if right < n and current.data < current.next.data:
+            largest = right
+
+        if largest != i:
+            self.swap(i, largest)
+            self.heapify(n, largest)
+
+    def swap(self, i, j):
+        current_i = self.head
+        current_j = self.head
+
+        for _ in range(i):
+            current_i = current_i.next
+
+        for _ in range(j):
+            current_j = current_j.next
+
+        current_i.data, current_j.data = current_j.data, current_i.data
+
+    def heap_sort(self):
+        n = 0
+        current = self.head
+        while current:
+            n += 1
+            current = current.next
+
+        for i in range(n // 2 - 1, -1, -1):
+            self.heapify(n, i)
+
+        for i in range(n - 1, 0, -1):
+            self.swap(0, i)
+            self.heapify(i, 0)
+
+# Example usage:
+linked_list = LinkedList()
+linked_list.push(12)
+linked_list.push(11)
+linked_list.push(13)
+linked_list.push(5)
+linked_list.push(6)
+linked_list.push(7)
+
+print("Original Linked List:")
+linked_list.print_list()
+
+linked_list.heap_sort()
+
+print("Sorted Linked List:")
+linked_list.print_list()