u012358474的专栏

1.归并排序的步骤如下：       Divide: 把长度为n的输入序列分成两个长度为n/2的子序列。       Conquer: 对这两个子序列分别采用归并排序。             Combine: 将两个排序好的子序列合并成一个最终的排序序列。2.时间复杂度：       这是一个递推公式（Recurrence），我们需要消去等号右侧的

Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two numbers such that they add up to the target, whe

Reverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321class Solution {public: int reverse(int x) { long long int res = 0; while(

Implement atoi to convert a string to an integer.Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input ca

Determine whether an integer is a palindrome. Do this without extra space.1221  -> true-1221 -> falseclass Solution {public: bool isPalindrome(int x) { if(x < 0) return false;

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)P A H NA P L S I

今天打开虚拟机想重新启动Ubuntu遇到这个问题：网上搜索后，解决方案如下：1.根据初始启动页面下的信息，在本地找到Ubuntu.vmx文件：  2.编辑该文件：将 vmci0.present = "true"  改为false