Given a sorted linked list, delete all duplicates such that each element appear only once.
Example：
Input: 1->1->2
Output: 1->2
Input: 1->1->2->3->3
Output: 1->2->3
解释下题目：
给定一个排好序的链表，删除其中的重复元素
1. 老老实实做呗
实际耗时：0ms
public ListNode deleteDuplicates(ListNode head) {
ListNode current = head;
ListNode result = current;
if (null == current) {
return null;
}
while (current.next != null) {
if (current.val == current.next.val) {
current.next = current.next.next;
} else {
current = current.next;
}
}
return result;
}
思路：就是最简单的要是跟下一个一样，就把下一个跳过去即可。
