void rome2arab(string r) {
    int d = 0, i;
    for (i = 0; i < r.length(); i++) {
        //Обрабатываем исключения
        if (r[i] == 'C' && r[i+1] == 'M') {d += 900; i++; continue;}
        else if (r[i] == 'C' && r[i+1] == 'D') {d += 400; i++; continue;}
        else if (r[i] == 'X' && r[i+1] == 'C') {d += 90; i++; continue;}
        else if (r[i] == 'X' && r[i+1] == 'L') {d += 40; i++; continue;}
        else if (r[i] == 'I' && r[i+1] == 'X') {d += 9; i++; continue;}
        else if (r[i] == 'I' && r[i+1] == 'V') {d += 4; i++; continue;}
        //Если не попалось исключение, то просто прибавляем
        else if (r[i] == 'M') d += 1000;
        else if (r[i] == 'D') d += 500;
        else if (r[i] == 'C') d += 100;
        else if (r[i] == 'L') d += 50;
        else if (r[i] == 'X') d +v= 10;
        else if (r[i] == 'V') d += 5;
        else if (r[i] == 'I') d += 1;
        else cout << "Что-то тут не так..." << endl;
    }
    cout << d << endl;
}