LeetCode

Given the head of a singly linked list, reverse the list, and return the reversed list . Example 1:

一起养成写作习惯！这是我参与「掘金日新计划 · 4 月更文挑战」的第13天，点击查看活动详情。 Given an array of n integers nums and a target, find

Write an efficient algorithm that searches for a value target in an m x n integer matrix matrix. Thi

Design a data structure that follows the constraints of a Least Recently Used (LRU) cache. Implement

Given the head of a sorted linked list, delete all duplicates such that each element appears only on

Given the head of a sorted linked list, delete all nodes that have duplicate numbers, leaving only d

Given the head of a singly linked list, return true if it is a palindrome. Example 1: Example 2: Con

Write a function to delete a node in a singly-linked list. You will not be given access to the head

一起养成写作习惯！这是我参与「掘金日新计划 · 4 月更文挑战」的第6天，点击查看活动详情。 You are given a perfect binary tree where all leaves

一起养成写作习惯！这是我参与「掘金日新计划 · 4 月更文挑战」的第5天，点击查看活动详情。 Given the head of a singly linked list, group all the

Given a string columnTitle that represents the column title as appear in an Excel sheet, return its

一起养成写作习惯！这是我参与「掘金日新计划 · 4 月更文挑战」的第3天，点击查看活动详情。 Given two strings s and t, return true if t is an ana

Given an integer n, return a string array answer (1-indexed) where : answer[i] == "FizzBuzz" if i is

Leetcode 22. Generate Parentheses - 生成指定数量的有效圆括号，比如输入2，输出()()、(())

Write an efficient algorithm that searches for a target value in an m x n integer matrix. The matrix