#include<iostream>#include<vector>#include<string>using namespace std;int main(){    int num;    cin>>num;    string result;    int a1[]={1000,900,500,400,100,90,50,40,10,9,5,4,1};    string a2[]={"M", "CM", "D", "CD", "C", "XC","L", "XL", "X", "IX", "V", "IV", "I"};    int i=0;    while(num>0)    {        int count=num/a1[i];        while(count--)            result+=a2[i];        num=num%a1[i];        i++;    }    cout<<result<<endl;}