int RomanType::convert( string rom ) {
    vector<int> storage;
    for (int i = 0; i < rom.size(); ++i) {
        switch(rom[i]) {
        case 'M':
            storage.push_back(1000);
            break;
        case 'D':
            storage.push_back(500);
            break;
        case 'C':
            storage.push_back(100);
            break;
        case 'L':
            storage.push_back(50);
            break;
        case 'X':
            storage.push_back(10);
            break;
        case 'V':
            storage.push_back(5);
            break;
        case 'I':
            storage.push_back(1);
            break;
        default:
            break;
        }
    }

    int value = storage[0];
    for (int i = 1; i < storage.size(); ++i) {
        if (storage[i-1] < storage[i]) {
            value += storage[i] - storage[i-1];
            value -= storage[i-1];
        } else {
            value += storage[i];
        }
    }

    return value;

}