0 std::lower_bound() implementation 5 What's the time complexity of std::lower_bound with std::set? 3 LowerBound in multiset stl 0 C++ std::set with a custom lower_bound 2 C++ STL set lower_bound wrong result 2 lower bound for set in cpp 0 Index of the lower_bound of a...
#include<set>#include<utility>#include<algorithm>#include<iostream>structpair_comparer{booloperator()(conststd::pair<int, std::string>& p1,conststd::pair<int, std::string>& p2)const{returnp1.second > p2.second; } };intmain(){ std::set<std::pair<int, std::string>, pair_comparer> ...
set和lower_bound()也是一样。有一个统一的函数std::lower_bound(),它在随机访问迭代器上的O(logN)中工作,在其他迭代器上的O(N)中工作。容器std::set具有双向迭代器,不能提供对其成员的随机访问。所以统一的std::lower_bound()在O(N)中工作。而容器集是二叉搜索树,可以使用不同的算法在O(logN)中找到下界...
对应lower_bound()函数是upper_bound()函数,它返回比key值大的最后一个元素 也同样是要求有序数组,若数组中无重复元素,则两者返回值xian相同 本文参与 腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。 原始发表:2018年08月12日,如有侵权请联系 cloudcommunity@tencent.com 删除 前往查看 容器 ios ...
set<T> st; //declaration st<T> st::iterator it; //iterator declaration it=st.upper_bound(T key); Parameter(s) It accepts a "key" ofTtype. Return value Iflower_boundof the key exists in the set, Iterator pointer to the lower bound, Else,st.end() ...
SetLowerBound is supported only for Datasets (not vectors) while GetLowerBound is supported for all vectorbase derived objects. This allows for creation of more general purpose functions that can take vectorbase objects as arguments in place of Dataset objects. Essentially, the lower bound can be ...
看来在STL set里用lower_bound效率是n^2的。 [Aug 24, 2014 Update] 我意外地发现set里也有一个lower_bound函数,于是去试了一下。效率很高耶。 ///main.cpp//test///Created by Africamonkey on 8/24/14.//Copyright (c) 2014 Africamonkey. All rights reserved.//#include<cstdio>#include<cstdlib...
set<T> st; //declaration st<T> st::iterator it; //iterator declaration it=st.upper_bound(T key); Parameter(s) It accepts a "key" ofTtype. Return value Iflower_boundof the key exists in the set, Iterator pointer to the lower bound, Else,st.end() ...
// cliext_set_lower_bound.cpp // compile with: /clr #include <cliext/set> typedef cliext::set<wchar_t> Myset; int main() { Myset c1; c1.insert(L'a'); c1.insert(L'b'); c1.insert(L'c'); // display initial contents " a b c" for each (wchar_t elem in c1) System::...
In both cases, the function set::key_comp(key, x) is used to determine if the keys match. The equal_range function returns a pair value, where .First is the result of the lower_bound function, and .second is the result of the upper_bound function....