#include <bits/stdc++.h>

using namespace std;
int main()
{
    int n;
    cin >> n;
    if(n == 100)
        cout << "C";
    else{
        switch(n / 10){
            case 1: cout << "X"; break;
            case 2: cout << "XX"; break;
            case 3: cout << "XXX"; break;
            case 4: cout << "XL"; break;
            case 5: cout << "L"; break;
            case 6: cout << "LX"; break;
            case 7: cout << "LXX"; break;
            case 8: cout << "LXXX"; break;
            case 9: cout << "XC"; break;
        }
        switch(n % 10){
            case 1: cout << "I"; break;
            case 2: cout << "II"; break;
            case 3: cout << "III"; break;
            case 4: cout << "IV"; break;
            case 5: cout << "V"; break;
            case 6: cout << "VI"; break;
            case 7: cout << "VII"; break;
            case 8: cout << "VIII"; break;
            case 9: cout << "IX"; break;
        }
    }
    return 0;
}