Cerinta completa

This challenge is part of a tutorial track by MyCodeSchool and is accompanied by a video lesson.

Given a pointer to the head node of a linked list and an integer to insert at a certain position, create a new node with the given integer as its attribute, insert this node at the desired position, and return the head node.

A position of 0 indicates the head, a position of 1 indicates one node away from the head, and so on. The head pointer given may be null, meaning that the initial list is empty.

Example
refers to the first node in the list

Insert a node at position with . The new list is

Function Description
Complete the function with the following parameters:

  • : a reference to the head of the list
  • : an integer value to insert as data in the new node
  • : an integer position to insert the new node, zero-based indexing

Returns

  • : a reference to the head of the revised list

Input Format

The first line contains an integer , the number of elements in the linked list.
Each of the next lines contains an integer SinglyLinkedListNode[i].data.
The next line contains an integer , the data of the node that is to be inserted.
The last line contains an integer .

Constraints

  • , where is the element of the linked list.
  • .

Sample Input

STDIN   Function
-----   --------
3       n = 3
16      llist = 16->13->7
13
7
1       data = 1
2       position = 2

Sample Output

16 13 1 7

Explanation

The initial linked list is . Insert at the position which currently has in it. The updated linked list is .

Limbajul de programare folosit: cpp14

Cod:

SinglyLinkedListNode* insertNodeAtPosition(SinglyLinkedListNode* llist, int data, int position) {
    SinglyLinkedListNode* node = new SinglyLinkedListNode(data);
    if (position == 0) {
        node->next = llist;
        return node;
    }
    SinglyLinkedListNode* cur = llist;
    for (int i = 0; i < position - 1 && cur; ++i) cur = cur->next;
    if (cur) {
        node->next = cur->next;
        cur->next = node;
    }
    return llist;
}

Scor obtinut: 1.0

Submission ID: 464654465

Link challenge: https://www.hackerrank.com/challenges/insert-a-node-at-a-specific-position-in-a-linked-list/problem

Insert a node at a specific position in a linked list