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MergeTwoSortedLists.java

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MergeTwoSortedLists.java

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/**

* Definition for singly-linked list.

* public class ListNode {

* int val;

* ListNode next;

* ListNode(int x) {

* val = x;

* next = null;

* }

* }

*/

public class Solution {

public ListNode mergeTwoLists(ListNode l1, ListNode l2) {

ListNode dummy = new ListNode(0);

ListNode p = dummy;

while(l1 != null && l2 != null) {

if (l1.val > l2.val) {

p.next = l2;

l2 = l2.next;

} else {

p.next = l1;

l1 = l1.next;

}

p = p.next;

}

if (l1 != null) {

p.next = l1;

}

if (l2 != null) {

p.next = l2;

}

return dummy.next;

}

}