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In a singly linked list, how can you find the middle element in one pass?
In a singly linked list, how can you find the middle element in one pass?
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Practice Questions
1 question
Q1
In a singly linked list, how can you find the middle element in one pass?
Use two pointers
Count nodes first
Use recursion
Use a stack
Show Solution
Copy
By using two pointers, where one moves twice as fast as the other, you can find the middle element in one pass.
Questions & Step-by-step Solutions
1 item
Q
Q: In a singly linked list, how can you find the middle element in one pass?
Solution:
By using two pointers, where one moves twice as fast as the other, you can find the middle element in one pass.
Steps: 4
Show Steps
Step 1: Start with two pointers, 'slow' and 'fast'. Both pointers should begin at the head of the linked list.
Step 2: Move the 'slow' pointer one step forward (to the next node) and the 'fast' pointer two steps forward (to the node after the next node).
Step 3: Repeat Step 2 until the 'fast' pointer reaches the end of the linked list or there are no more nodes for it to move to.
Step 4: When the 'fast' pointer reaches the end, the 'slow' pointer will be at the middle of the linked list.
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