In this question what linked list use inbuilt or make a linked list

#1

if i am using inbuilt linked list how access linkedlist head

#2

you need to build a linked list on your own. Input is just set of numbers, you need to create a linked list from a set of numbers. sample input is given in following link:
https://hack.codingblocks.com/app/contests/1343/171/problem

Thanks.