unordered_set 和 set 是C++标准库中的两个容器类型,它们有以下区别: 元素顺序: set 是有序容器,它根据元素的键值进行排序,并且每个元素在容器中都有一个唯一的位置。相反,unordered_set 是无序容器,它不维护元素的顺序,元素在容器中的位置由哈希函数计算得出。 实现机制: set 使用红黑树(一种自平衡二叉查找树)...
C++ 学习笔记9-unordered_multiset、set和unordered_map、multimap 六,程序员大本营,技术文章内容聚合第一站。
// unordered_set_eq.cpp // compile by using: cl.exe /EHsc /nologo /W4 /MTd #include <unordered_set> #include <iostream> #include <ios> int main() { using namespace std; unordered_set<char> c1, c2, c3; c1.insert('a'); c1.insert('b'); c1.insert('c'); c2.insert('c'...
unordered_set vs set Doubt In this question822C - Hacker, pack your bags!, when I used set it gave TLE on test case 10 but when I used unordered_set, it got Accepted. I read some blogs where they told not to use unordered_set/map on CF as it can be hacked, so what should I ...
compile with: /EHsc #include <unordered_set> #include <iostream> typedef std::unordered_set<char> Myset; int main() { Myset c1; c1.insert('a'); c1.insert('b'); c1.insert('c'); // display contents " [c] [b] [a]" for (Myset::const_iterator it = c1.begin(); it !
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: unordered_set是C++标准库中的一种数据结构,它实现了无序集合的功能。它使用哈希表来存储数据,这样可以快速地插入、删除和查找元素。而链表find是指在链表中查找特定元素的操作。 性...
// unordered_set_begin.cpp // compile using: cl.exe /EHsc /nologo /W4 /MTd #include <unordered_set> #include <iostream> using namespace std; typedef unordered_set<char> MySet; int main() { MySet c1; c1.insert('a'); c1.insert('b'); c1.insert('c'); // display contents ...
compile with: /EHsc #include <unordered_set> #include <iostream> typedef std::unordered_set<char> Myset; int main() { Myset c1; c1.insert('a'); c1.insert('b'); c1.insert('c'); // display contents " [c] [b] [a]" for (Myset::const_iterator it = c1.begin(); it !
// std_tr1__unordered_set__unordered_set_find.cpp // compile with: /EHsc #include <unordered_set> #include <iostream> typedef std::unordered_set<char> Myset; int main() { Myset c1; c1.insert('a'); c1.insert('b'); c1.insert('c'); // display contents " [c] [b] [a]"...