#include<map> #include<cstdio> #include<iostream> #include<ext/pb_ds/assoc_container.hpp> #include<ext/pb_ds/hash_policy.hpp> using namespace std; using namespace __gnu_pbds; int main() { int n; //map<int>mp; //mp[23]="132"; gp_hash_table<int,bool>h; h[54]=1; cout<<h[54]; }
原文：http://www.cnblogs.com/sssy/p/7066753.html