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Source Problem Remove all elements from a linked list of integers that have value val. Example Given 1->2->3->3->4->5->3, val = 3, you should return t 阅读全文
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Source Problem Given a linked list, swap every two adjacent nodes and return its head. Example Given 1->2->3->4, you should return the list as 2->1->4 阅读全文
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Source Problem Given a list, rotate the list to the right by k places, where k is non-negative. Example Given 1->2->3->4->5 and k = 2, return 4->5->1- 阅读全文
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Problem Statement Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set. 阅读全文
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Source Implement an algorithm to delete a nodein the middle of a singly linked list, given only access to that node. Example Given 1->2->3->4, and nod 阅读全文
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Source Given a singly linked list of characters, write a function that returns true if the given list is palindrome, else false. 题解1 - 使用辅助栈 根据栈的特性(FI 阅读全文
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背景 最近在对接国内的外卖平台，代码啥的正常开发、测试、上线都没发现什么异常的。突然，最近有运维反馈说漏了单据，一开始我以为是外卖平台那边接口异常，拉单延迟导致的，就没怎么放在心上。过了半天，运维那边继续反馈此类问题，且最开始那个订单依旧没有同步，这个时候我看了接口响应都是正常的，但是JSON解析返 阅读全文
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Source Sort a linked list using insertion sort. A graphical example of insertion sort. The partial sorted list (black) initially contains only the fir 阅读全文
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Source Sort a linked list in O(n log n) time using constant space complexity. 题解1 - 归并排序(链表长度求中间节点) 链表的排序操作，对于常用的排序算法，能达到 O(nlogn) 的复杂度有快速排序(平均情况)、归并排 阅读全文
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Source A linked list of length n is given such that each node contains an additional random pointer, which could point to any node in the list, or nul 阅读全文