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Problem: Rotate List

med
30 min
Understand how to rotate a singly linked list to the right by a given number of positions using efficient in-place techniques. This lesson covers the problem constraints, explains the shift logic, and guides you through coding your solution in Python to handle linked list rotations effectively.

Statement

You are given the head of a singly linked list and a non-negative integer k. Your task is to rotate the list to the right by k positions.

A right rotation by 1 means the last node becomes the new head, and every other node shifts one position to the right.

Return the head of the rotated linked list.

Constraints:

  • The number of nodes in the list is in the range [0, 500].

  • 100-100 \leq Node.val 100\leq 100

  • 00 \leq k 2×109\leq 2 \times 10^9

Tap here to switch tabs
Problem
Ask
Submissions

Problem: Rotate List

med
30 min
Understand how to rotate a singly linked list to the right by a given number of positions using efficient in-place techniques. This lesson covers the problem constraints, explains the shift logic, and guides you through coding your solution in Python to handle linked list rotations effectively.

Statement

You are given the head of a singly linked list and a non-negative integer k. Your task is to rotate the list to the right by k positions.

A right rotation by 1 means the last node becomes the new head, and every other node shifts one position to the right.

Return the head of the rotated linked list.

Constraints:

  • The number of nodes in the list is in the range [0, 500].

  • 100-100 \leq Node.val 100\leq 100

  • 00 \leq k 2×109\leq 2 \times 10^9