面试题 02.01:移除重复节点

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huangge1199 2021-06-07 13:19:08 +08:00
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//编写代码移除未排序链表中的重复节点保留最开始出现的节点
//
// 示例1:
//
//
// 输入[1, 2, 3, 3, 2, 1]
// 输出[1, 2, 3]
//
//
// 示例2:
//
//
// 输入[1, 1, 1, 1, 2]
// 输出[1, 2]
//
//
// 提示
//
//
// 链表长度在[0, 20000]范围内
// 链表元素在[0, 20000]范围内
//
//
// 进阶
//
// 如果不得使用临时缓冲区该怎么解决
// Related Topics 链表
// 👍 108 👎 0
package leetcode.editor.cn;
import com.code.leet.entiy.ListNode;
import java.util.ArrayList;
import java.util.List;
//面试题 02.01:移除重复节点
public class RemoveDuplicateNodeLcci{
public static void main(String[] args) {
//测试代码
Solution solution = new RemoveDuplicateNodeLcci().new Solution();
}
//力扣代码
//leetcode submit region begin(Prohibit modification and deletion)
/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
class Solution {
public ListNode removeDuplicateNodes(ListNode head) {
List<Integer> list = new ArrayList<>();
ListNode temp = head;
ListNode pro = null;
while (temp != null) {
if (list.contains(temp.val)) {
pro.next = temp.next;
} else {
list.add(temp.val);
pro = temp;
}
temp = temp.next;
}
return head;
}
}
//leetcode submit region end(Prohibit modification and deletion)
}

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<p>编写代码,移除未排序链表中的重复节点。保留最开始出现的节点。</p>
<p> <strong>示例1:</strong></p>
<pre>
<strong> 输入</strong>[1, 2, 3, 3, 2, 1]
<strong> 输出</strong>[1, 2, 3]
</pre>
<p> <strong>示例2:</strong></p>
<pre>
<strong> 输入</strong>[1, 1, 1, 1, 2]
<strong> 输出</strong>[1, 2]
</pre>
<p><strong>提示:</strong></p>
<ol>
<li>链表长度在[0, 20000]范围内。</li>
<li>链表元素在[0, 20000]范围内。</li>
</ol>
<p> <strong>进阶:</strong></p>
<p>如果不得使用临时缓冲区,该怎么解决?</p>
<div><div>Related Topics</div><div><li>链表</li></div></div>\n<div><li>👍 108</li><li>👎 0</li></div>