![]() If we are already at the end, then we can insert the element in constant time. ![]() Operations at the end of Linked List like inserting element at the end takes linear time because we have to traverse to the end. In case of array, for similar operation, we need to shift all other elements which makes the time complexity linear. This is done in constant time as we need to change the address stored to previous nodes only. The advantage of Linked List comes when we have to insert an element at current location or delete current element. This is an overhead compared to Array where the overhead to encountered only once. Time Complexity of Linked Listįrom this article on time complexity of memory address, we known that to access a specific element, the time complexity is O(√N) where N is block of continuous elements being read.Īs Linked List elements are not contiguous, each element access incur a Time Complexity of O(√N). To get the address of ith node, we need to traverse all nodes before it because the address of ith node is stored with i-1th node and so on. In Singly Linked List, only the pointer to the first node is stored. It can increase at runtime depending on number of elements dynamically without any overhead. Size of Linked List need not be known in advance.Elements are not stored in contiguous memory locations.The pointer points to the fist node of the list but the link part of the last node has no next node to point to. The beginning of the node marked by a special pointer named START. The second part contains a link that points to the next node of the list that is the address of the next node.The first part contains the actual data of the node.This is a simple form, yet it is effective for several problems such as Big Integer calculations.Ī singly linked list is made up of nodes where each node has two parts: Singly Linked List is a variant of Linked List which allows only forward traversal of linked lists. Let us get started with Time Complexity Analysis of Linked List. We have presented space complexity of Linked List operations as well. It clears several misconceptions such that Time Complexity to access i-th element takes O(1) time but in reality, it takes O(√N * N) time. In this article, we have presented the Time Complexity analysis of different operations in Linked List.
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