LeetCode 21. Merge Two Sorted Lists
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class Solution {public: ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) { ListNode *ret,*ret_head,*l1_pt = l1,*l2_pt = l2; if(l1 == NULL) return l2; if(l2 == NULL) return l1; if(l1->val < l2->val) { ret_head = l1;l1_pt = l1->next; } else { ret_head = l2;l2_pt = l2->next; } ret = ret_head; while(1) { if(l1_pt == NULL) { ret->next = l2_pt;break; } if(l2_pt == NULL){ ret->next = l1_pt;break; } if(l1_pt->val < l2_pt->val) { ret->next = l1_pt; l1_pt = l1_pt->next; } else { ret->next = l2_pt; l2_pt = l2_pt->next; } ret = ret->next; } return ret_head; }};二路有序链表合并 0 0
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