Map

    map<int,int> ma;
    ma.insert(pair<int,int>(0,0));
    ma[1] = 1;
    cout<<ma.begin()->first<<' '<<ma.begin()->second<<endl;//0 0
    cout<<ma.rbegin()->first<<' '<<ma.rbegin()->second<<endl;//1 1
    cout<<ma[1]<<endl;// 1
    ma[2]=2;
    ma.erase(2);
    cout<<(int)(ma.find(2) == ma.end())<<endl;// 1