USING UNORDERD MAPS:

include

using namespace std; int main(){ int n,i,num; cin>>n; string name;

unordered_map<string,int>pbook;
while(n--)
{
    cin>>name;
    cin>>num;
    pbook[name]=num;
} 
string sname;
while(cin>>sname){
     if(pbook.find(sname)==pbook.end())
       cout<<"Not found"<<endl;
    else 
      cout<<sname<<'='<<pbook[sname]<<endl;
}

}