目录
- 题目描述:
- 示例:
- 解法:
题目描述:
给定一个链表和一个特定值 x,对链表进行分隔,使得所有小于 x 的节点都在大于或等于 x 的节点之前。
你应当保留两个分区中每个节点的初始相对位置。
示例:
输入: head = 1->4->3->2->5->2, x = 3
输出: 1->2->2->4->3->5
解法:
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
ListNode* partition(ListNode* head, int x) {
ListNode* lhead = NULL, *lcur = NULL, *rhead = NULL, *rcur = NULL;
ListNode* cur = head;
while(cur != NULL){
if(cur->val < x){
if(lhead == NULL){
lhead = new ListNode(cur->val);
lcur = lhead;
}else{
lcur->next = new ListNode(cur->val);
lcur = lcur->next;
}
}else{
if(rhead == NULL){
rhead = new ListNode(cur->val);
rcur = rhead;
}else{
rcur->next = new ListNode(cur->val);
rcur = rcur->next;
}
}
cur = cur->next;
}
if(lhead == NULL){
return rhead;
}else{
lcur->next = rhead;
return lhead;
}
}
};
原文地址:https://www.cnblogs.com/zhanzq/p/10774749.html
时间: 2024-10-09 00:57:58