题意:找到第一个出问题的版本 二分查找,注意 mid = l + (r - l + 1) / 2;因为整数会溢出 // Forward declaration of isBadVersion API. bool isBadVersion(int version); class Solution { public: int firstBadVersion(int n) { , r = n , ans ; while(l <= r){ ) / ; if(!isBadVersion(mid)){ l…

You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed based on the previous version, all the versions after a bad ve…

题目描述: You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed based on the previous version, all the versions after a…

You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed based on the previous version, all the versions after a bad ve…

题目: You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed based on the previous version, all the versions after a ba…

You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed based on the previous version, all the versions after a bad ve…

You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed based on the previous version, all the versions after a bad ve…

很多其它请关注我的HEXO博客:http://jasonding1354.github.io/ 简书主页:http://www.jianshu.com/users/2bd9b48f6ea8/latest_articles 二分查找 二分查找算法是一种在有序数组中查找某一特定元素的搜索算法.搜素过程从数组的中间元素開始,假设中间元素正好是要查找的元素,则搜索过程结束:假设某一特定元素大于或者小于中间元素,则在数组大于或小于中间元素的那一半中查找,并且跟開始一样从中间元素開始比較.假设在某一步骤数组…

0.数组高级 (1)选择排序 它的工作原理是每一次从待排序的数据元素中选出最小(或最大)的一个元素,存放在序列的起始位置,然后,再从剩余未排序元素中继续寻找最小(大)元素,然后放到已排序序列的起始位置.以此类推,直到全部待排序的数据元素排完 // 选择排序 /** * asc:升序 desc:降序 * @param arr 要排序的数组 * @param isAsc 是否升序 true:升序 false:降序 */ // 下面是直接交换元素,零一种方法是定义一个最小下角标,如minIndex =…

1. 二分查找       二分查找又称折半查找,优点是比较次数少,查找速度快,平均性能好:其缺点是要求待查表为有序表,且插入删除困难.因此,折半查找方法适用于不经常变动而查找频繁的有序列表. 比较 基本查找 与 二分查找 ? (1)基本查找:数组元素无序(从头找到尾) (2)二分查找(折半查找):数组元素有序 2. 二分查找原理 (1)思想:每次都猜中间那个元素,比较大或者小,就能减少一半的元素. (2)原理图: 3. 二分查找的代码实现: package cn.itcast_04; /* *…