Scarborough's Fair

摘要： Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree [1,2,2,3,4,4,3] is symmet 阅读全文

摘要： 不得不吐槽下visual studio真是越来越大了。我的盘子表示鸭梨很大。于是乎，我遇见了vscode。 嘿嘿，再见Visual studio。 但是，vscode让人非常想吐槽的就是配置。。。因此在成功生成第一个exe文件后，我决定记录下这次成功的经历。 在此感谢JaJaCube，感谢大佬的教程 阅读全文

摘要： Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. Given an array of size  阅读全文

摘要： Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once. Given an array of integers where 阅读全文

摘要： Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. Given an array n 阅读全文

摘要： You are given coins of different denominations and a total amount of money. Write a function to compute the number of combinations that make up that a 阅读全文

摘要： Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Example 2: Example 3: 阅读全文

摘要： Invert a binary tree. Example: Input: Output: 方法2：递归求解，简洁的让人觉得可怕,跑的还飞快，推荐食用👍 阅读全文

摘要： We have an array A of integers, and an array queries of queries. For the i-th query val = queries[i][0], index = queries[i][1], we add val to A[index] 阅读全文

摘要： Given an array A of integers, for each integer A[i] we may choose any x with -K <= x <= K, and add x to A[i]. After this process, we have some array B 阅读全文