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[LeetCode]Intersection of Two Linked Lists

题目描述:

Write a program to find the node at which the intersection of two singly linked lists begins.

For example, the following two linked lists:

A:          a1 → a2
                   ↘
                     c1 → c2 → c3
                   ↗            
B:     b1 → b2 → b3

begin to intersect at node ...

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[Leetcode]Sort List

题目描述:

Sort a linked list in O(n log n) time using constant space complexity.

题目大意:

使用常数空间复杂度,对一个链表执行O(n log n)时间复杂度的排序

解题思路:

归并排序,链表的中点可以通过“快慢指针”法求得。

Python代码:

# Definition for singly-linked list.
# class ListNode:
#     def __init__(self, x):
#         self.val = x
#         self ...

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