How should I practice Rotate List?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Bloomberg LP phone screen and onsite interview problems in FastPrep.

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Rotate List

Bloomberg LP● MediumNEW GRADPHONE SCREENONSITE INTERVIEW

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Problem statement

Rotate the singly linked list to the right by k positions and return the new head.

Function

rotateRight(head: ListNode, k: int) → ListNode

Examples

Example 1

head = [1,2,3,4,5]k = 2return = [4,5,1,2,3]

The last two nodes move to the front.

Constraints

The list contains at most 10^5 nodes.
0 <= k <= 10^9.