Девайсы

#define _USE_MATH_DEFINES
#include <iostream>
#include <conio.h>
#include <string>
#include <set>
#include <map>
#include <algorithm>
#include <string>
#include <math.h>
#include <vector>
#include <cmath>

using namespace std;

struct dev
{
    long long sell;
    long long sc;
};

bool operator< (dev p1, dev p2)
{
    if (p1.sc == p2.sc)
        return p1.sell < p2.sc;
    else
        return p1.sc < p2.sc;
}
int main()
{
    string s, max;
    map <string, dev> product;
    long long maxsc=-1, maxsell=-1;

    while (cin >> s)
    {
        string prom;
        int prom2;
        cin >> prom;
        cin >> prom2;
        if (product.find(prom) != product.end())
        {
            if (product[prom].sell > prom2)
                product[prom].sell = prom2;
            product[prom].sc++;
        }
        else
        {
            dev prom3;
            prom3.sell = prom2;
            prom3.sc = 1;
            product.insert(pair <string, dev>(prom, prom3));
        }
    }

    for (auto i = product.begin(); i != product.end(); i++)
    {
        if (i->second.sc > maxsc)
        {
            max = i->first;
            maxsc = i->second.sc;
            maxsell = i->second.sell;
        }
        else
            if (i->second.sc == maxsc)
                if (i->second.sell < maxsell)
                {
                    max = i->first;
                    maxsc = i->second.sc;
                    maxsell = i->second.sell;
                }
    }

    cout << max;

    _getch();
    return 0;
}