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class Node: def __init__(self, data): self.data = data self.next = None def traverseAndPrint(head): currentNode = head while currentNode: print(currentNode.data, end=" -> ") currentNode = currentNode.next print("null") def insertNodeAtPosition(head, newNode, position): if position == 1: newNode.next = head return newNode currentNode = head for _ in range(position - 2): if currentNode.next is None: break currentNode = currentNode.next newNode.next = currentNode.next currentNode.next = newNode return head node1 = Node(7) node2 = Node(3) node3 = Node(2) node4 = Node(9) node1.next = node2 node2.next = node3 node3.next = node4 print("Original list:") traverseAndPrint(node1) # Insert a new node with value 97 at position 2 newNode = Node(97) node1 = insertNodeAtPosition(node1, newNode, 2) print("\nAfter insertion:") traverseAndPrint(node1)
Original list:
7 -> 3 -> 2 -> 9 -> null
After insertion:
7 -> 97 -> 3 -> 2 -> 9 -> null
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