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Grokking the Coding Interview Patterns in C++

Solution: Delete N Nodes After M Nodes of a Linked List

Explore an in-place linked list manipulation technique to delete n nodes after retaining m nodes. Learn how to traverse and modify the list efficiently, ensuring understanding of pointer updates and list reconnection. This lesson helps develop skills to solve linked list problems involving selective node deletion and practice optimizing time and space complexity.

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Statement

Given the head of a linked list and two integers, m and n, remove some specific nodes from the list and return the head of the modified, linked list. The list should be traversed, and nodes removed as follows:

  1. Start with the head node and set it as the current node.

  2. Traverse the next m nodes from the current node without deleting them.

  3. Traverse the next n nodes and delete them.

  4. Repeat steps 2 and 3 above until the end of the linked list is reached.

Constraints:

  • 1≤1 \leq Node ≤103\leq 10^3 ...