Linked Lists
8 min · Python examples
Chain nodes with next pointers — traverse, count, and update without shifting a whole array.
Techniques · Linked Lists0/5 cleared
Enemy 1 of 5
A singly linked list stores values in nodes. Each node holds a value and a next pointer to the following node.
Traverse by walking from head with a while loop: cur = cur.next until cur is None. Inserting at the front is O(1); finding by index is O(n).
You
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Target output: 3
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