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Day 15: Linked List Hackerrank Solution Java

 Day 15: Linked List Hackerrank Solution Java

For Explanation Check Video:


Sample Input

STDIN   Function
-----   --------
4       T = 4
2       first data = 2
3
4
1       fourth data = 1

Sample Output

2 3 4 1
Code:
import java.io.*;
import java.util.*;

class Node {
    int data;
    Node next;
    Node(int d) {
        data = d;
        next = null;
    }
}

class Solution {

    public static  Node insert(Node head,int data) {
        Node n = new Node(data);
        if(head==null){
            return n;
        }else{
            Node temp = head;
            while(temp.next!=null){
                temp = temp.next;
            }
            temp.next = n;
            return head;
        }
    }

    public static void display(Node head) {
        Node start = head;
        while(start != null) {
            System.out.print(start.data + " ");
            start = start.next;
        }
    }

    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        Node head = null;
        int N = sc.nextInt();

        while(N-- > 0) {
            int ele = sc.nextInt();
            head = insert(head,ele);
        }
        display(head);
        sc.close();
    }
}

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