// http://en.cppreference.com/w/cpp/container/unordered_map
// unordered_map example
#include <iostream>
#include <string>
#include <unordered_map>
using namespace std;

int main()
{
  unordered_map<string, int> maListe;
  maListe = { {"x1", 5}, {"mu", 3}, {"y1", 1}, {"a3", 7}, {"b5", 2}, {"xi", 6}, {"mu", 4} };

  for(auto it = maListe.begin(); it != maListe.end(); ++it)
    cout << it->first << " = " << it->second << endl;

  return 0;
} // main()