#include <iostream>

#include <fstream>
using namespace std;
const  int M = 1000;
const  int D = 500;
const int C = 100;
const  int L = 50;
const  int X = 10;
const  int V = 5;
const  int I = 1;

int main()
{
    ifstream f("fis.in");
    int i, c_arabic=0,nr=0, c_arabicp,  ok=1;
    char c,p;
    //retin cifra precedenta
    f>>p;
    switch( p )
    {
    case 'M':
        c_arabicp= M;
        break;
    case 'D':

        c_arabicp = D;
        break;
    case 'C':

        c_arabicp = C;
        break;
    case 'L':

        c_arabicp = L;
        break;
    case 'X':

        c_arabicp = X;
        break;
    case 'V':

        c_arabicp = V;
        break;
    case 'I':
        c_arabicp = I;
        break;
    default:
    {
        cout<<"Not a valid Roman numeral!" ;
        ok=0;
        break;
    }
    }
 cout<<c_arabicp<<endl;
    while(f>>c && ok==1)
    {
        //citesc cifra curenta


        switch( c )
        {
        case 'M':
            c_arabic = M;
            break;
        case 'D':
            c_arabic = D;
            break;
        case 'C':
           c_arabic = C;
            break;
        case 'L':

            c_arabic = L;
            break;
        case 'X':
            c_arabic = X;
            break;
        case 'V':
           c_arabic = V;
            break;
        case 'I':
            c_arabic = I;
            break;
        default:
        {
            cout<<"Not a valid Roman numeral!" ;
            ok=0;
            break;
        }
        }
        if(ok)
        {


            if(c_arabicp<c_arabic)
                nr=nr-c_arabicp;
            else
                nr=nr+c_arabicp;
            c_arabicp=c_arabic;

        }

        }

    if(ok)
    {
        nr=nr+c_arabicp;
        cout<<nr;
    }
}