1474.

Delete N Nodes After M Nodes of a Linked List

Easy

Given the head of a linked list and two integers m and n. Traverse the linked list and remove some nodes in the following way: Start with the head as the current node. Keep the first m nodes starting with the current node. Remove the next n nodes Keep repeating steps 2 and 3 until you reach the end of the list. Return the head of the modified list after removing the mentioned nodes. Follow up question: How can you solve this problem by modifying the list in-place? Example 1: Input: head = [1,2,3,4,5,6,7,8,9,10,11,12,13], m = 2, n = 3 Output: [1,2,6,7,11,12] Explanation: Keep the first (m = 2) nodes starting from the head of the linked List (1 ->2) show in black nodes. Delete the next (n = 3) nodes (3 -> 4 -> 5) show in read nodes. Continue with the same procedure until reaching the tail of the Linked List. Head of linked list after removing nodes is returned. Example 2: Input: head = [1,2,3,4,5,6,7,8,9,10,11], m = 1, n = 3 Output: [1,5,9] Explanation: Head of linked list after removing nodes is returned. Example 3: Input: head = [1,2,3,4,5,6,7,8,9,10,11], m = 3, n = 1 Output: [1,2,3,5,6,7,9,10,11] Example 4: Input: head = [9,3,7,7,9,10,8,2], m = 1, n = 2 Output: [9,7,8] Constraints: The given linked list will contain between 1 and 10^4 nodes. The value of each node in the linked list will be in the range [1, 10^6]. 1 <= m,n <= 1000