Add Two Numbers 2020-09-10 21:44
public static ListNode addTwoNumbers(ListNode l1, ListNode l2) {
ListNode root = new ListNode(0);
ListNode cursor = root;
int carry = 0;
while (l1 != null || l2 != null || carry != 0) {
int l1Val = l1 != null ? l1.val : 0;
int l2Val = l2 != null ? l2.val : 0;
int sumVal = l1Val + l2Val + carry;
carry = sumVal / 10;
ListNode sumNode = new ListNode(sumVal % 10);
cursor.next = sumNode;
cursor = sumNode;
if (l1 != null) l1 = l1.next;
if (l2 != null) l2 = l2.next;
}
return root.next;
}
| Runtime | Memory |
|---|---|
| 2 ms | 39.6 MB |
EOF