出现在使用没有定义作为unordered_map的键的pair类型或vector类型的hash键值。 unordered_map<pair<int,int>,int> mp;// pair没有hash值 unordered_map中用std::hash来计算key,但是C++中没有给pair做Hash的函数,所以不能用pair作为unordered_map的key。同理,unordered_set这类也是哈希表的也不能用pair类型或vecto...
1 #include <iostream> 2 #include <unordered_set> 3 #include <utility> 4 #include <vector> 5 6 using namespace std; 7 8 using KEY = pair<int,int>; 9 10 // 自定义pair的哈希 11 struct PairHash 12 { 13 size_t operator()(const KEY& key) const 14 { 15 return hash<int>{}(key...
boost::unordered_map<int, int>(N) assign cost: 55.783 ms google::dense_hash_map<int, int> assign cost: 49.709 ms google::dense_hash_map<int, int, nohashint> assign cost: 38.583 ms google::dense_hash_map<int, int>(N) assign cost: 30.799 ms tsl::hopscotch_map<int, int> assign ...
int main() { pair<int, string> s1(2, "李明"),s2(4,"小红"),s3(5,"沉"); unordered_map<int, string>my; my.insert(make_pair(1, "mary")); my.insert(s2); my.insert(s3); unordered_map<int, string>::iterator it; for (it = my.begin(); it != my.end(); it++) cout <<...
// hash_multimap_op_ne.cpp// compile with: /EHsc#include<hash_map>#include<iostream>intmain( ){usingnamespacestd;usingnamespacestdext; hash_multimap <int,int> hm1, hm2, hm3;inti;typedefpair <int,int> Int_Pair;for( i =0; i <3; i++ ) { hm1.insert ( Int_Pair ( i, i ) ...
( 10 ); hms1.insert( 20 ); hms1.insert( 30 ); pair <IntHSet::const_iterator, IntHSet::const_iterator> p1, p2; p1 = hms1.equal_range( 20 ); cout << "The upper bound of the element with " << "a key of 20\nin the hash_multiset hms1 is: " << *(p1.second) << "....
Hashmap.insert(make_pair<int,int>(1,3)); Hashmap.insert(make_pair(1,3)); 以上两种皆可 通过键添加 Hashmap[3]=1; 其他函数 it = Hashmap.begin() //指向哈希表的第一个容器 it = Hashmap.end() //指向哈希表的最后一个容器,实则超出了哈希表的范围,为空 ...
(ull l,ull r,intlen){returnl*p[len]+r;}};structHASH// 双哈希{intn;vector<pair<int,int>>h,rh;pair<int,int>pw[N];constintmod1=127657753,mod2=987654319;constintb1=141,b2=277;HASH(){}HASH(string s){n=s.size();h.resize(n+1);rh.resize(n+1);for(inti=1;i<=n;i++){h[...
Code for CVPR 2018 Paper"HashGAN: Deep Learning to Hash with Pair Conditional Wasserstein GAN". Prerequisites Python3, NumPy, TensorFlow-gpu, SciPy, Matplotlib, OpenCV, easydict, yacs, tqdm A recent NVIDIA GPU We provide aenvironment.yamlfor you and you can simplely useconda env create -f en...
// cliext_hash_set_equal_range.cpp // compile with: /clr #include <cliext/hash_set> typedef cliext::hash_set<wchar_t> Myhash_set; typedef Myhash_set::pair_iter_iter Pairii; int main() { Myhash_set c1; c1.insert(L'a'); c1.insert(L'b'); c1.insert(L'c'); // display ...