题解 | #合并两个排序的链表(优化)#
合并两个排序的链表
https://www.nowcoder.com/practice/d8b6b4358f774294a89de2a6ac4d9337
/*
struct ListNode {
int val;
struct ListNode *next;
ListNode(int x) :
val(x), next(NULL) {
}
};*/
class Solution {
public:
ListNode* Merge(ListNode* pHead1, ListNode* pHead2) {
ListNode* result = NULL;
if (pHead1 == NULL) {
return pHead2;
} else if (pHead2 == NULL) {
return pHead1;
} else {
if(pHead1->val<=pHead2->val){
pHead1 ->next = Merge(pHead1->next,pHead2);
return pHead1;
}
else{
pHead2->next = Merge(pHead1, pHead2->next);
return pHead2;
}
}
}
};


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