해커랭크(HackerRank) - Insert a node at the head of a linked list / C++

문제 : 해커랭크  -

Insert a node at the head of a linked list

 

난이도: Easy

언어 : C++

 

SinglyLinkedListNode* insertNodeAtHead(SinglyLinkedListNode* llist, int data) {

    SinglyLinkedListNode* ret ;
    if(llist == nullptr)
    {
        llist = new SinglyLinkedListNode(data);
        ret = llist;

    }else {
        SinglyLinkedListNode* nNode = new SinglyLinkedListNode(data);
        nNode->next = llist;
        ret = nNode;
    }
    return ret;
}