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Copy path082-RemoveDuplicatesFromSortedList2.cs
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082-RemoveDuplicatesFromSortedList2.cs
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//-----------------------------------------------------------------------------
// Runtime: 168ms
// Memory Usage:
// Link:
//-----------------------------------------------------------------------------
namespace LeetCode
{
public class _082_RemoveDuplicatesFromSortedList2
{
public ListNode DeleteDuplicates(ListNode head)
{
var first = new ListNode(-1)
{
next = head
};
bool isDuplicate = false;
var prev = first;
for (var p = head; p != null && p.next != null; p = p.next)
{
if (!isDuplicate)
if (p.val == p.next.val)
isDuplicate = true;
else
prev = p;
else if (p.val != p.next.val)
{
isDuplicate = false;
prev.next = p.next;
}
}
if (isDuplicate)
{
prev.next = null;
}
return first.next;
}
}
}