<<"\t\t\t"<< (float)mapEraseTime / unorderedMapEraseTime << std::endl;return0; }// 输出结果:// 操作 map(微秒) unordered_map(微秒) 性能比// 插入 225419 116690 1.93178// 顺序查找 103715 20122 5.15431// 随机查找 127432 25890 4.92205//
<< "\t\t\t" << (float)mapInsertTime / unorderedMapInsertTime << std::endl; std::cout << "顺序查找\t" << mapLookupTime << "\t\t" << unorderedMapLookupTime << "\t\t\t" << (float)mapLookupTime / unorderedMapLookupTime << std::endl; std::cout << "随机查找\t" << map...
map vs unordered_map in C++先决条件:std::map、std::unordered_map说到效率,地图和无序地图有着巨大的差异。我们必须知道两者的内部工作,才能决定使用哪...
In yesterday's roundCodeforces Round 617 (Div. 3), in question1296C - Yet Another Walking Robot, I submitted this solution using map which took 61ms to pass:70273184. Today, I thought of submitting the same solution using unordered map, which I later found out doesn't have a hash functi...
unordered_map Class06/21/2022 The class template describes an object that controls a varying-length sequence of elements of type std::pair<const Key, Ty>. The sequence is weakly ordered by a hash function, which partitions the sequence into an ordered set of subsequences called buckets. ...
1.What is the difference between set vs map in C++ ? 👉stl - C++中的设置与地图有什么区别?- 堆栈溢出 (stackoverflow.com) The're fullfilling different purposes, one is a map, one is a set. If you need a map, use the map. If you need a set, use the set. performance and memory...
collisions which cause the use of buckets which slow the unordered_map down, etc. But in this case, the only thing I'm doing is inserting and using the unordered_map::count function. are these not examples of where the unordered_map's O(1) time complexity should beat the map's O(...
[c] [b] [a] [c] [b] [a] unordered_multiset::bucket Gets the bucket number for a key value. C++ Copy size_type bucket(const Key& keyval) const; Parameters keyval The key value to map. Remarks The member function returns the bucket number currently corresponding to the key value...
[c] [b] [a] [c] [b] [a] unordered_multiset::bucket Gets the bucket number for a key value. C++ Copy size_type bucket(const Key& keyval) const; Parameters keyval The key value to map. Remarks The member function returns the bucket number currently corresponding to the key value...
It also suggests that the proposed method has the accuracy comparative to those by the edit distance for ordered trees and by an existing method for glycan search. Conclusions: The proposed method is simple but useful for computation of the edit distance between unordered tr...