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Reverse Linked List

Reverse a linked list. Do it in-place and in one-pass.

For example:
Given 1->2->3->4->5->NULL,

return 5->4->3->2->1->NULL.

PROBLEM APPROACH :

Complete solution code in the hints

NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a doubt? Checkout Sample Codes for more details.
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