LeetCode 21:Merge Two Sorted Lists
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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.
题目分析:对两个有序列表进行合并,这个是数据结构基本题目比较简单,代码如下:
class Solution {public: ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) { ListNode head(-1);ListNode * tmp = &head;while (l1 && l2){if (l1->val < l2->val){tmp->next = l1;l1 = l1->next;}else{tmp->next = l2;l2 = l2->next;}tmp = tmp->next;}if (l1)tmp->next = l1;if(l2)tmp->next = l2;return head.next; }};
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