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摘要： Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and not the 阅读全文

摘要： Given a singly linked list, determine if it is a palindrome. Example 1: Example 2: 题目要求：以 O(1) 的空间复杂度来求解。 切成两半，把后半段反转，然后比较两半是否相等。 时间复杂度：o（n） 空间复杂度：o（1 阅读全文

摘要： You are given two non-empty linked lists representing two non-negative integers. The most significant digit comes first and each of their nodes contai 阅读全文

摘要： Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes, only nodes itself may be ch 阅读全文