#include <stdio.h>
#include <string.h>

int rom_arab(char s[]){
	int pom;
	if (strstr(s,"MMMMMMMMMM")!=NULL) pom=10000;
	else if (strstr(s,"MMMMMMMMM")!=NULL) pom=9000;
	else if (strstr(s,"MMMMMMMM")!=NULL) pom=8000;
	else if (strstr(s,"MMMMMMM")!=NULL) pom=7000;
	else if (strstr(s,"MMMMMM")!=NULL) pom=6000;
	else if (strstr(s,"MMMMM")!=NULL) pom=5000;
	else if (strstr(s,"MMMM")!=NULL) pom=4000;
	else if (strstr(s,"MMM")!=NULL) pom=3000;
	else if (strstr(s,"MM")!=NULL) pom=2000;
	else if (strstr(s,"M")==s) pom=1000;
	if (strstr(s,"CM")!=NULL) pom=pom+900;
	if (strstr(s,"CD")!=NULL) pom=pom+400;
	else if (strstr(s,"D")!=NULL) pom=pom+500;
	if (strstr(s,"CCC")!=NULL) pom=pom+300;
	else if (strstr(s,"CC")!=NULL) pom=pom+200;


	if ((strstr(s,"CL")!=NULL) || (strstr(s,"CX")!=NULL) || (strstr(s,"CV")!=NULL) || (strstr(s,"CI")!=NULL) || (strstr(s,"C\0")!=NULL)) 
		if(strstr(s,"XC")==NULL) pom=pom+100;
		else pom=pom+90;
			
	

	if (strstr(s,"XL")!=NULL) pom=pom+40;
	else if (strstr(s,"L")!=NULL) pom=pom+50;
	if (strstr(s,"XXX")!=NULL) pom=pom+30;
	else if (strstr(s,"XX")!=NULL) pom=pom+20;
	if ((strstr(s,"X")!=NULL) && (strstr(s,"XC")==NULL) && (strstr(s,"XL")==NULL) && (strstr(s,"XX")==NULL))
		if(strstr(s,"IX")==NULL) pom=pom+10;
		else pom=pom+9;
	if (strstr(s,"IV")!=NULL) pom=pom+4;
	else if (strstr(s,"V")!=NULL) pom=pom+5;
	if (strstr(s,"III")!=NULL) pom=pom+3;
	else if (strstr(s,"II")!=NULL) pom=pom+2; 
	if ((strstr(s,"I")!=NULL) && (strstr(s,"IX")==NULL) && (strstr(s,"IV")==NULL) && (strstr(s,"II")==NULL))
		pom=pom+1;
		

	return pom;
}

int main(){
	printf("zadaj string\n");
	char s[255];
	scanf("%s",s);
	printf("%d",rom_arab(s));
	return 0;
}