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package mypackage;
import java.io.*;

public class RimToArab {
		public static void main(String [] args){
			System.out.println("Enter the Roman numeral:");
			String Rim = "";
			char[] Rch = {'I','V','X','L','C','D','M'};
			int[] Acf = {1,5,10,50,100,500,1000};
			
			
			int i,j=0,rez=0;						
			try {
				BufferedReader d = new BufferedReader(new InputStreamReader(System.in));
				Rim = d.readLine();  
			} catch  (IOException e) {
				System.out.println("Input error!");
			} 				
			for (int c = Rim.length()-1; c>=0; --c ){				
					for(i=6;i>=0; --i){
						if (Rch[i]==Rim.charAt(c)){
							if (j>Acf[i]){
								rez=rez-Acf[i];
							} else {
								rez=rez+Acf[i];
							}					
							j=Acf[i];
						}											
					}							
									
			}				
			if (rez!=0){
				System.out.println(rez);
			}	else {
				System.out.println("Wrong format of input!");
			}
		}
}