For today’s algorithm, we will insert a node at the head of a singly linked list. Star 0 Then, add temp (old head) after new head. First, a new node with given element is created. The code is very simple to understand. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. Skip to content. In this program, we will create a singly linked list and add a new node at the beginning of the list. 2. Make newly added node as the new head of the list. Here is the challenge that I picked from HackerRank:. HackerRank - Insert a node at the head of a linked list - Insert a node at the head of a linked list.cpp. It is then added at the end of the list by linking the last node to the new node. We just made a new node first – node *tmp = new node; tmp->next=head – In this line, we have followed the second step which is to point the ‘next’ of the new node to the head of the linked list.. And in the last line, we are making the new node ‘head’ as per the third step – head = tmp; The second case is the simplest one. If the head node is not null, (Linked list already has some elements), find the last node. Then, make this new node as the new tail of the list. To accomplish this task, add a new node after the tail of the list such that tail's next will point to the newly added node. Java program to insert a new node at the end of the singly linked list. The head points to the memory address 1024 and it is the last node. To add a new node at end we need to allocate space for the new node first, then we have to store null in the pointer of newly created node and make the new node as tail of the linked list. Consider the above list; node 1 represents the head of the original list. In this program, we will create a singly linked list and add a new node at the end of the list. keeproll / Insert a node at the head of a linked list.cpp. Created Sep 6, 2018. 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