标签:style blog color ar sp for div on log
Given a sorted linked list, delete all duplicates such that each element appear only once.
For example,
Given 1->1->2
, return 1->2
.
Given 1->1->2->3->3
, return 1->2->3
.
这题比较简单,用两个指针,一个cursor遍历链表用,一个stick指向上一个不重复的node,这样每次遍历时如果cursor跟stick不一样的话就把stick的next指向cursor,然后更新stick,这样一直到遍历结束,还有最后一步很容易遗漏,就是把stick指向NULL,因为此时stick应该是新链表的尾巴。
这个方法能适用是因为链表是有序的。
ListNode *deleteDuplicates(ListNode *head) { if (!head) return NULL; ListNode *stick = head, *cursor = head->next; while (cursor) { if (cursor->val == stick->val) { cursor = cursor->next; continue; } else { stick->next = cursor; stick = cursor; } cursor = cursor->next; } stick->next = NULL; return head; }
[LeetCode] Remove Duplicates from Sorted List
标签:style blog color ar sp for div on log
原文地址:http://www.cnblogs.com/agentgamer/p/4085815.html