6) Swap Nodes in Pairs

Hi geeks! Today we going to see about how to swap the linked list nodes in a pair wise. Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list’s nodes, only nodes itself may be changed. Example: Given 1->2->3->4, you should return the list as 2->1->4->3. …

6) Swap Nodes in Pairs Read More »