#Leetcode# 21. Merge Two Sorted Lists
https://leetcode.com/problems/merge-two-sorted-lists/description/
Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.
Example:
Input: 1->2->4, 1->3->4 Output: 1->1->2->3->4->4
代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | /** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */ class Solution { public : ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) { ListNode *dummy = new ListNode(-1), *cur = dummy; while (l1 && l2) { if (l1 -> val < l2 -> val) { cur -> next = l1; l1 = l1 -> next; } else { cur -> next = l2; l2 = l2 -> next; } cur = cur -> next; } cur -> next = l1 ? l1 : l2; return dummy -> next; } }; |
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