Remove Nth Node From End of List
Remove nth node from end of linked list Example: [1,2,3,4,5], n = 2 => [1,2,3,5]
Remove Nth Node From End of List rewards a clean two-pointer invariant instead of checking every combination. Interviewers love it because it reveals your invariant-driven scanning and your edge-case discipline. Keep the invariant in your head and the pointer moves become obvious.
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