#include <vector>
#include <utility>
#include <iostream>
#include <functional>

using namespace std;

int main()
{
    vector<pair<string, int>> v; 
    v.push_back(make_pair("abc", 10));
    auto f = bind(&pair<string, int>::second, v.begin());
    int res = f();
    cout << res << endl;
    return 0;
}