AcWing 36. 合并两个排序的链表
原题链接
简单
Java代码
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
class Solution {
public ListNode merge(ListNode l1, ListNode l2) {
ListNode dummy = new ListNode(-1);
ListNode cur = dummy;
while(l1 != null && l2 != null){
if(l1.val <= l2.val){
cur.next = l1;
cur = cur.next;
l1 = l1.next;
}else{
cur.next = l2;
cur = cur.next;
l2 = l2.next;
}
}
if(l1 != null){
cur.next = l1;
}else{
cur.next = l2;
}
return dummy.next;
}
}