逻辑比较简单, 但是感觉对链表的掌握程度不够,需要重新学习一遍链表的基本操作。
class Solution {
public:
ListNode* mergeTwoLists(ListNode* l1, ListNode* l2) {
ListNode* HeadNode = new ListNode(0);
ListNode* MergeNode = HeadNode;
while((l1 != NULL)&&(l2 != NULL))
{
if(l1->val >= l2->val)
{
MergeNode->next = l2;
l2 = l2->next;
}
else
{
MergeNode->next = l1;
l1 = l1->next;
}
MergeNode = MergeNode->next;
}
while(l1 != NULL)
{
MergeNode->next = l1;
l1 = l1->next;
MergeNode = MergeNode->next;
}
while(l2 != NULL)
{
MergeNode->next = l2;
l2 = l2->next;
MergeNode = MergeNode->next;
}
return HeadNode->next;
}
};