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.

/** * 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(0);        ListNode *tmp = dummy;        while (l1 != NULL && l2 != NULL)        {            if (l1->val < l2->val)            {                tmp->next = l1;                l1 = l1->next;            }            else            {                tmp->next = l2;                l2 = l2->next;            }            tmp = tmp->next;        }        if (l1 == NULL)tmp->next = l2;        if (l2 == NULL) tmp->next = l1;        return dummy->next;    }};

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21.Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21.Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
21. Merge Two Sorted Lists
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