二分查找函数(lower_bound、upper_bound和 binary_search) 这3个函数是STL库提供的高效查找工具,之前刷leetcode的时候经常用到,但总是搞混lower_bound和upper_bound,这里做个总结。下面这3个函数的使用均要求容器序列有序,具体使用例子结果如下: 1. lower_bound函数 顾名思义,这个函数是在一段有序序列当中,查找...
【leetcode73】经典算法-Guess Number Higher or Lower 题目描述: 从1～n中,随便的拿出一个数字,你来猜测。 提示 提供一个guess(int num)的api,针对猜测的数字,返回三个数值。0,-1,1 0;猜中返回num -1:比猜测的数值小 1:比猜测的数值大 例如: n = 10, I pick 6. Return 6. 原文描述: We are ...
Thanks for the blog, I was getting TLE on leetcodehard problemjust because I was doingauto it = lower_bound(s.begin(),s.end(),val), but when I changed it to this auto it = s.lower_bound(val)the code got accepted. So does that mean the first one takes O(n) and the ...
374. Guess Number Higher or Lower We are playing the Guess Game. The game is as follows: I pick a number from1ton. You have to guess which number I picked. Every time you guess wrong, I will tell you whether the number I picked is higher or lower than your guess. You call a pre...