} //递归intbinary_search(vector<int>& nums,inttarget,intlow,inthigh) {if(low >high)returnlow;intmid = low + (high - low) /2;if(nums[mid] >target) {returnbinary_search(nums, target, low, mid -1);elseif(nums[mid] <target) {returnbinary_search(nums, targetm mid +1, high);el...
Algorithm | Binary Search 花了半天把二分查找的几种都写了一遍。验证了一下。二分查找的正确编写的关键就是,确保循环的初始、循环不变式能够保证一致。 可以先从循环里面确定循环不变式,然后再推导初始条件,最后根据循环不变式的内容推导出结果。 1. 普通的二分查找 第一版本: 1//first version2intfind(intarr...
C++标准库算法--Binary Search Algorithms 这篇文章是介绍C++标准库算法系列文章之一,介绍二分搜索算法(Binary Search Algorithm),这些算法都要求范围内的元素是排好序的。这篇文章只看C++17及其之前的算法,C++20及其以后版本暂时忽略,大多数C++20版本的算法都是只加了一个constexpr的要求或者range算法。也不看execution...
#include <iostream> #include <vector> #include <cstdlib> #include <algorithm> using namespace std; //二分搜索算法 int binary_search(const vector<int> vec, const int target, const int left, const int right){ if(left == right) return -1;//递归终点 int mid = left + (right-left)/2...
The explanation above provides a rough description of the algorithm. For the implementation details, we'd need to be more precise. We will maintain a pair$L < R$such that$A_L \leq k < A_R$. Meaning that the active search interval is$[L, R)$. We use half-interval here instead of...
Binary Search Problems Tutorial Binary searchis the most popular Search algorithm.It is efficient and also one of the most commonly used techniques that is used to solve problems. If all the names in the world are written down together in order and you want to search for the position of a...
#include <algorithm> #include "functional" int main() { // 创建一个 set 集合容器 vector<int> myVector; // 向容器中插入元素 myVector.push_back(9); myVector.push_back(5); myVector.push_back(2); myVector.push_back(2); myVector.push_back(7); ...
Binary search algorithm 二分搜索算法 "use strict"; /** * * @author xgqfrms * @license MIT * @copyright xgqfrms * @created 2019-08-22 * * @description binary search * @augments * @example * @link * */ let log = console.log; ...
Binary Search Algorithm Iteration Method do until the pointers low and high meet each other. mid = (low + high)/2 if (x == arr[mid]) return mid else if (x > arr[mid]) // x is on the right side low = mid + 1 else // x is on the left side high = mid - 1 ...
algorithmbinarycountincludesearch 引入#include<algorithm> 算法简介: find:查找元素 find_if:按条件查找 adjacent_find:查找相邻房重复的元素 binary_search:二分查找 count:统计元素个数 count_if:按条件统计元素个数 1.find #include<iostream> using namespace std; #include <vector> #include <algorithm> #in...