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Intersection of Two Linked Lists — Two Pointer Length Trick
Find the intersection node of two linked lists in O(n) O(1) by switching pointers at the end of each list.
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Convert Binary Number in Linked List to Integer — Bit Shift
Convert a linked list representing a binary number to its integer value using left-shift accumulation.
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Remove Linked List Elements — Dummy Head
Remove all nodes with a given value from a linked list using a dummy head to handle edge cases cleanly.
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Remove Nth Node From End of List — Fast/Slow with Dummy
Remove the nth node from the end in one pass using two pointers offset by n steps and a dummy head.
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Swap Nodes in Pairs — In-Place Pointer Rewiring
Swap every two adjacent nodes in a linked list without modifying node values using pointer rewiring.
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