Package g0301_0400.s0328_odd_even_linked_list

Class Solution

java.lang.Object
g0301_0400.s0328_odd_even_linked_list.Solution
public class Solution extends java.lang.Object
328 - Odd Even Linked List.

Medium

Given the head of a singly linked list, group all the nodes with odd indices together followed by the nodes with even indices, and return the reordered list.

The first node is considered odd , and the second node is even , and so on.

Note that the relative order inside both the even and odd groups should remain as it was in the input.

You must solve the problem in O(1) extra space complexity and O(n) time complexity.

Example 1:

Input: head = [1,2,3,4,5]

Output: [1,3,5,2,4]

Example 2:

Input: head = [2,1,3,5,6,4,7]

Output: [2,3,6,7,1,5,4]

Constraints:

  • n ==number of nodes in the linked list
  • 0 <= n <= 104
  • -106 <= Node.val <= 106

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    ListNode
    oddEvenList(ListNode head)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details