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AddTwoNumber2.java
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47 lines (45 loc) · 1.2 KB
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package medium;
import util.ListNode;
public class AddTwoNumber2
{
public ListNode addTwoNumbers(ListNode l1, ListNode l2)
{
if (l1 == null || l2 == null) {
return null;
}
ListNode result = null;
ListNode tmp = null;
int up = 0;
ListNode l11 = l1;
ListNode l22 = l2;
while (l11 != null || l22 != null) {
int num1 = 0;
int num2 = 0;
if (l11 != null) {
num1 = l11.val;
l11 = l11.next;
}
if (l22 != null) {
num2 = l22.val;
l22 = l22.next;
}
if (result == null) {
int re = (num1 + num2 + up) % 10;
up = (num1 + num2 + up) / 10;
result = new ListNode(re);
tmp = result;
}
else {
int re = (num1 + num2 + up) % 10;
up = (num1 + num2 + up) / 10;
ListNode now = new ListNode(re);
tmp.next = now;
tmp = now;
}
}
if (up != 0) {
tmp.next = new ListNode(up);
}
return result;
}
}