Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.
Example:
Input: 1->2->4, 1->3->4 Output: 1->1->2->3->4->4
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
class Solution {
public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
ListNode r = new ListNode(0);
ListNode c;
c=r;
while(l1 != null && l2 != null){
if(l1.val > l2.val){
c.next = l2;
l2 = l2.next;
} else {
c.next = l1;
l1 = l1.next;
}
c = c.next;
}
//將l1,l2剩下的Node加到result
if(l1 != null){
c.next = l1;
}
if(l2 != null){
c.next = l2;
}
return r.next;
}
}