Add Two Numbers.java

class Solution {
public ListNode addTwoNumbers(ListNode l1, ListNode l2) {
int carry =0;
ListNode newHead = new ListNode(0);
ListNode p1 = l1, p2 = l2, p3=newHead;
while(p1 != null || p2 != null){
if(p1 != null){
carry += p1.val;
p1 = p1.next;
}
if(p2 != null){
carry += p2.val;
p2 = p2.next;
}
p3.next = new ListNode(carry%10);
p3 = p3.next;
carry /= 10;
}
if(carry==1)
p3.next=new ListNode(1);
return newHead.next;
}
}