Leetcode - 24. Swap Nodes in Pairs

일시불 -

문제

Loading...
Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
LeetCode

정답

class Solution:
    def swapPairs(self, head: Optional[ListNode]) -> Optional[ListNode]:
        dummy = head
        while head and head.next:
            adj = head.next
            head.val, adj.val = adj.val, head.val

            head = head.next.next
        return dummy