What is the time complexity to insert an element to the rear of a LinkedList(head pointer given)
Question
What is the time complexity to insert an element to the rear of a LinkedList(head pointer given)
Solution
The time complexity to insert an element at the end of a LinkedList, when only the head pointer is given, is O(n). Here's why:
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Starting from the head, you have to traverse the entire LinkedList to find the last node. This is because you don't have a direct reference to the tail of the LinkedList. The traversal operation takes O(n) time, where n is the number of elements in the LinkedList.
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Once you find the last node, you create a new node and set its value to the element you want to insert. This operation takes constant time, i.e., O(1).
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You then set the next pointer of the last node to the new node. This operation also takes constant time, i.e., O(1).
So, the total time complexity is O(n) + O(1) + O(1), which simplifies to O(n).
Similar Questions
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