#include <iostream>
#include <string>
using namespace std;

int main(int argc, char *argv[]) {

if(argc < 2) {
	cout << "Usage: a.out <arabische Zahl>" << endl;
	return -1;
}
int zahl = atoi(argv[1]);

string rom[] = {"I","IV","V","IX","X","XL","L","XC","C","CD","D","CM","M"};
int romval[] = {1,4,5,9,10,40,50,90,100,400,500,900,1000};

for(int i=(sizeof(rom)/sizeof(rom[0])); i>=0; i--) {
	while((zahl-=romval[i])>0)
		cout << rom[i];
	if(zahl < 0)
		zahl += romval[i];		
	if(zahl == 0) 
		{cout << rom[i]; cout << endl; return  0;}	
}

}

MCDXXXIX