Linked List Cycle
Given a linked list, determine if it has a cycle in it.
Follow up:Can you solve it without using extra space?
解法一:
使用unordered_map记录当前节点是否被访问过,如访问过说明有环...
141. Linked List Cycle
Given a linked list, determine if it has a cycle in it.
Follow up:Can you solve it without using extra space?
利用快慢指针,如果相遇则证明有环
注意边界条件: 如果只有一个node...
141. Linked List Cycle【easy】
Given a linked list, determine if it has a cycle in it.
Follow up:Can you solve it without using extra space?
解法一:
/**
* Definition for singly-linked list.
*...
环形链表II
思路 https://www.cnblogs.com/springfor/p/3862125.html
https://blog.csdn.net/u010292561/article/details/80444057
假设周长为 S
AB + BC + n*S = 2 * ( AB + BC )
=> AB = BC + n*S
只...