set lower_bound() function in C++ STL set::lower_bound() 是C++ STL 中的一个内置函数,它返回一个指向容器中元素的迭代器,相当于传入参数的k。如果集合容器中不存在 k,则该函数返回一个迭代器,该迭代器指向刚好大于 k 的下一个元素。如果参数中传递的键超过容器中的最大值,则返回的迭代器指向 set.end...
// CPP program to demonstrate the// set::lower_bound() function#include<bits/stdc++.h>usingnamespacestd;intmain(){set<int> s;// Function to insert elements// in the set containers.insert(1); s.insert(4); s.insert(2); s.insert(5); s.insert(6);cout<<"The set elements are: "...
How to set the correct timezone to get a isoformat datetime string in Python? I need to assign to a variable the current datetime string in isoformat like the following: What I'm doing is: But this is going to print the string with utc tz: Not clear yet to me what's the clean w....
尝试n = 50000的测试数据,用时0.1s。 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...
C++ set容器中使用lower_bound的简单示例代码: cpp #include <iostream> #include <set> int main() { std::set<int> s; s.insert(1); s.insert(3); s.insert(5); s.insert(7); s.insert(9); int key = 4; auto it = s.lower_bound(key); if (it != s.end...
C++ STL set::lower_bound() 函数 set::lower_bound() 函数是一个预定义的函数,用于获取集合中任意元素的下界。 它从集合中找到任何所需元素的下限。下界any_element表示集合中第一个不被考虑之前的数字any_element.因此,如果any_element本身存在,那么它就是any_element否则立即下一个any_element。
// set_lower_bound.cpp // compile with: /EHsc #include <set> #include <iostream> int main( ) { using namespace std; set <int> s1; set <int> :: const_iterator s1_AcIter, s1_RcIter; s1.insert( 10 ); s1.insert( 20 ); s1.insert( 30 ); s1_RcIter = s1.lower_bound( 20 ...
std::set<std::pair<int, std::string>, pair_comparer> s; s.insert({3,"hello"}); s.insert({1,"world"}); s.insert({2,"bye"});for(auto& i : s) std::cout << i.first <<" "<< i.second << std::endl;return0;
#include <iostream> #include <set> int main () { std::set<int> myset; std::set<int>::iterator itlow,itup; for (int i = 1; i < 10; i++) myset.insert(i*10); itlow = myset.lower_bound (30); myset.erase(itlow); std::cout << "myset contains:"; for (std::set<in...
C++ STL set::lower_bound() function: Here, we are going to learn about the lower_bound() function of set in C++ STL (Standard Template Library). Submitted by Radib Kar, on February 16, 2019 C++ STL set::lower_bound() functionset::lower_bound() function is a predefined function, it...