题目信息

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问题解答

复习23题
https://leetcode-cn.com/submissions/detail/117526795/

  1. function mergeTwoLists(l1: ListNode | null, l2: ListNode | null): ListNode | null {
  2.     const dummyHead: any = {}
  3.     let cur = dummyHead
  4.     while(l1 !== null && l2 !== null) {
  5.         if(l1.val < l2.val) {
  6.             cur.next = l1
  7.             cur = cur.next
  8.             l1 = l1.next                                    
  9.         } else {
  10.             cur.next = l2
  11.             cur = cur.next
  12.             l2 = l2.next  
  13.         }
  14.     }
  16.     if(l1 === null) {
  17.         cur.next = l2
  18.     }
  20.     if(l2 === null) {
  21.         cur.next = l1
  22.     }
  24.     return dummyHead.next
  25. };