二分查找水题 记$sum[i]$为$d[i]$的前缀和数组 枚举第一段区间的结尾$i$ 然后二分出$lower$_$bound(sum[n]-sum[i])$的位置$x$,如果$sum[x]$与$sum[n]-sum[i]$相等,且$x$大于$i$,更新答案 #include<iostream> #include<cstdio> #include<algorithm> using namespace std; ; int n; long long sum[maxn],a…

题目: Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If found in the array return its index, otherwise return -1. You may assume no du…

题目: https://leetcode.com/problems/remove-duplicates-from-sorted-array/ Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate extra space for another array, you must do…

题目: Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If found in the array return its index, otherwise return -1. You may assume no du…

题目: Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate extra space for another array, you must do this in place with constant memory. For example,Given input array A…

给出一个序列(长度>=2),问去掉一个元素后是否能成为单调不降序列或单调不增序列. 对任一序列,先假设其可改造为单调不降序列,若成立则输出YES,不成立再假设其可改造为单调不增序列,若成立则输出YES,不成立则输出NO. 由于持平不影响整体单调性,为了直观,我在以下把“不降”称为“递增/升序”,把“不增”称为“递减/降序”. 递增和递减是对称的,这里先考虑递增,递减改个符号和最值就好. 我们把为维护单调性而去掉的那个点称为“坏点”.由题目的要求,“可改造”可等价于“只存在一个坏点”. 对于“坏点…

[bytes] 英文文档: class bytes([source[, encoding[, errors]]]) Return a new “bytes” object, which is an immutable sequence of integers in the range 0 <= x < 256. bytes is an immutable version of bytearray – it has the same non-mutating methods and the sa…

[033-Search in Rotated Sorted Array(在旋转数组中搜索)] [LeetCode-面试算法经典-Java实现][全部题目文件夹索引] 原题 Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search.…

Java&Selenium数据驱动[DataProvider+TestNG+Array] package testNGWithDataDriven; import java.util.concurrent.TimeUnit; import org.testng.Assert; import org.openqa.selenium.By; import org.openqa.selenium.WebDriver; import org.openqa.selenium.chrome.ChromeDr…

一.进程间通信        linux下面提供了多种进程间通信的方法, 管道.信号.信号量.消息队列.共享内存.套接字等.下面我们分别 介绍管道.信号量.消息队列.共享内存.        信号和套接字在后续介绍.   1.管道     管道又分为无名管道.命名管道.   无名管道用于父子进程间通信, 而命名管道则可以用于同一计算机上运行的 两个进程间的通信.管道可以用类似“水管”的原理来理解.   1)无名管道     要在父子进程进程间使用管道进行通信,那么先需要创建管道, 在linux中…