Grokking the Coding Interview: Patterns for Coding Questions

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Reverse a Sub-list (medium)

Problem Statement

Given the head of a LinkedList and two positions ‘p’ and ‘q’, reverse the LinkedList from position ‘p’ to ‘q’.

Constraints:

The number of nodes in the list is n.
1 <= n <= 500
-500 <= Node.val <= 500
1 <= left <= right <= n

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