题目描述
输入两个单调递增的链表,输出两个链表合成后的链表,当然我们需要合成后的链表满足单调不减规则。
代码
/*
struct ListNode {
int val;
struct ListNode *next;
ListNode(int x) :
val(x), next(NULL) {
}
};*/
class Solution {
public:
ListNode* Merge(ListNode* pHead1, ListNode* pHead2)
{
if (pHead1 == NULL) {
return pHead2;
}
if (pHead2 == NULL) {
return pHead1;
}
if (pHead1->val <= pHead2->val) {
pHead1->next = Merge(pHead1->next, pHead2);
return pHead1;
} else {
return Merge(pHead2, pHead1);
}
}
};