What is the time complexity of deleting a node from the middle of a singly linked list?Group of answer choicesO(1)O(n log n)O(n)O(log n)
Question
What is the time complexity of deleting a node from the middle of a singly linked list?
Group of answer choices:
- O(1)
- O(n log n)
- O(n)
- O(log n)
Solution
The time complexity of deleting a node from the middle of a singly linked list is O(n).
Here's why:
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In a singly linked list, you don't have a direct reference to the middle node. You have to start from the head of the list and traverse through the list until you reach the middle node.
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The time complexity of traversing a list is proportional to the number of elements in the list, which is O(n) where n is the number of elements in the list.
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Once you've found the node to delete, the deletion operation itself is O(1), because you're just changing the next pointer of the previous node to point to the next node.
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Therefore, the overall time complexity is dominated by the traversal, which is O(n).
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