## AddTwoNumbers.java ( File view )

• By issaczr 2014-10-24
• View(s)：52
• Point(s)： 1
```			// Author:   Li Long, 1988lilong@163.com
// Date:     Apr 18, 2014
// Analysis: http://blog.csdn.net/lilong_dream/article/details/19544995

// You are given two linked lists representing two non-negative numbers.
// The digits are stored in reverse order and each of their nodes contain a single digit.
// Add the two numbers and return it as a linked list.
// Input: (2 -> 4 -> 3) + (5 -> 6 -> 4)
// Output: 7 -> 0 -> 8

/**
* public class ListNode {

*     int val;
*     ListNode next;
*     ListNode(int x) {

*         val = x;
*         next = null;
*
}
*
}
*/

public ListNode addTwoNumbers(ListNode l1, ListNode l2) {

// IMPORTANT: Please reset any member data you declared, as
// the same Solution instance will be reused for each test case.
if (l1 == null) {

return l2;

}
if (l2 == null) {

return l1;

}

int len1 = 0;
int len2 = 0;

++len1;

}

++len2;

}

ListNode longer = len1 >= len2 ? l1 : l2;
ListNode shorter = len1 < len2 ? l1 : l2;

ListNode result = null;
ListNode sum = null;

int val = 0;
int carry = 0;

while (shorter != null) {

val = longer.val + shorter.val + carry;
carry = val / 10;
val -= carry * 10;

if (sum == null) {

sum = new ListNode(val);
result = sum;

} else {

sum.next = new ListNode(val);
sum = sum.next;

}

longer = longer.next;
shorter = shorter.next;

}

while (longer != null) {

val = longer.val + carry;
carry = val / 10;
val -= carry * 10;

sum.next = new ListNode(val);
sum = sum.next;

longer = longer.next;

}

if (carry != 0) {

sum.next = new ListNode(carry);

}

return result;

}

public void print(ListNode node) {

while (node != null) {

System.out.print(node.val + "->");
node = node.next;

}

}

public static void main(String[] args) {

ListNode l1 = new ListNode(2);
ListNode n2 = new ListNode(4);
ListNode n3 = new ListNode(3);

l1.next = n2;
n2.next = n3;

ListNode l2 = new ListNode(5);
ListNode n4 = new ListNode(6);
ListNode n5 = new ListNode(4);
l2.next = n4;
n4.next = n5;

slt.print(result);

}

}			```
...
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...
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