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Reverse a linked list from position m to n. Do it in one-pass.
- To reverse a linked list from position m to n, we need to use 4 pointers.
- The 4 pointers used are: new_head, pre, cur, and Move.
- We set the first 3 pointers and start reversing the list by changing the immediate node after 'cur'.
- The solution in C++ provides the implementation of reversing a linked list from position m to n.
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