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38 lines (37 loc) · 1018 Bytes
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Copy pathAddTwoNumbers.java
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38 lines (37 loc) · 1018 Bytes
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public class AddTwoNumbers{
public ListNode addTwoNumbers(ListNode l1, ListNode l2){
ListNode result = null;
ListNode cur = null;
int carry = 0, d1 = 0, d2 = 0, sum = 0;
while(l1 != null || l2 != null){
d1 = (l1 == null)? 0:l1.val;
d2 = (l2 == null)? 0:l2.val;
sum = d1 + d2 + carry;
if(sum >= 10){
carry = 1;
sum = sum - 10;
} else {
carry = 0;
}
if(result == null){
result = new ListNode(sum);
cur = result;
} else {
cur.next = new ListNode(sum);
cur = cur.next;
}
l1 = (l1 == null)? null: l1.next;
l2 = (l2 == null)? null: l2.next;
}
if(carry != 0)
cur.next = new ListNode(carry);
return result;
}
}
class ListNode {
int val;
ListNode next;
ListNode(int x){
val = x;
}
}