[리트코드 leetcode] 328. Odd Even Linked List

leetcode.com/problems/odd-even-linked-list/

Odd Even Linked List - LeetCode

 

# Definition for singly-linked list.
# class ListNode:
#     def __init__(self, val=0, next=None):
#         self.val = val
#         self.next = next
class Solution:
    def oddEvenList(self, head: ListNode) -> ListNode:
        if not head:
            return None
        
        root = head
        root2 = head.next
        
        odd = head
        even = head.next
        
        while even and even.next:
            odd.next = odd.next.next
            even.next = even.next.next
            
            odd = odd.next
            even = even.next
            
        odd.next = root2
        
        return root