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E21_MergeTwoSortedLists.java
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E21_MergeTwoSortedLists.java
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class Solution {
public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
ListNode temp = l1;
ListNode result = new ListNode(0);
ListNode t2 = result;
while(l1!=null && l2!=null){
result.next = new ListNode(0);
result = result.next;
if(l1.val<=l2.val){
result.val = l1.val;
l1 = l1.next;
}
else{
result.val = l2.val;
l2 = l2.next;
}
}
if(l1==null && l2!=null){
while(l2!=null)
{
result.next = new ListNode(0);
result = result.next;
result.val = l2.val;
l2 = l2.next;
}
}
if(l2==null && l1!=null){
while(l1!=null)
{
result.next = new ListNode(0);
result = result.next;
result.val = l1.val;
l1 = l1.next;
}
}
result = t2.next;
return result;
}
}