lower_bound算法要求在已经按照非递减顺序排序的数组中找到第一个大于等于给定值key的那个数,其基本实现原理是二分查找,如下所示: int lower_bound(vector<int> arr, int key) { int half; int len = arr.size(); int mid; ; ) { half = len >> ; mid = first + half; //in the right part if (arr[mid] < key) { f
Constructing Roads In JGShining's Kingdom Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 14635 Accepted Submission(s): 4158 Problem Description JGShining's kingdom consists of 2n(n is no mo
Search Insert Position Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order. You may assume no duplicates in the array. Here are few examples. [1,3,5
Return iterator to lower bound Returns an iterator pointing to the first element in the range [first,last) which does not compare less than val. Return iterator to upper bound Returns an iterator pointing to the first element in the range [first,last
自己按照stl实现了一个: http://www.cplusplus.com/reference/algorithm/binary_search/ 这里有个注释,如何判断两个元素相同: Two elements, a and bare considered equivalent if (!(a<b) && !(b<a)) lower_bound返回!(*it<val) ,所以binary_search 只要再判断 !(val<*it) 即可. template
本文为senlie原创,转载请保留此地址:http://blog.csdn.net/zhengsenlie lower_bound(应用于有序区间) -------------------------------------------------------------------------------------------------------------------------- 描写叙述:二分查找,返回一个迭代器指向每个"不小于 value "的元素, 或 value 应