/**
* struct ListNode {
* int val;
* struct ListNode *next;
* ListNode(int x) : val(x), next(nullptr) {}
* };
*/
class Solution {
public:
/**
* 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可
*
*
* @param pHead1 ListNode类
* @param pHead2 ListNode类
* @return ListNode类
*/
ListNode* Merge(ListNode* pHead1, ListNode* pHead2) {
// write code here
ListNode* pHead=new ListNode(-1);
ListNode* cur=pHead;
while(pHead1&&pHead2)
{
if(pHead1->val<pHead2->val)
{
cur->next=pHead1;
pHead1=pHead1->next;
}
else{
cur->next=pHead2;
pHead2=pHead2->next;
}
cur=cur->next;
}
//pHead1或者pHead2为空
if(pHead1)
{
cur->next=pHead1;
}
else{
cur->next=pHead2;
}
return pHead->next;
}
};