#include <bits/stdc++.h>
using namespace std;

int romanToInt(string s) {
    map<char, int> m;
    m['I'] = 1;
    m['V'] = 5;
    m['X'] = 10;
    m['L'] = 50;
    m['C'] = 100;
    m['D'] = 500;
    m['M'] = 1000;
    int len = s.length();
    if(len <= 0)
        return 0;
    int result = m[s[len - 1]];
    for(int i = len - 2; i >= 0; i--){
        if(m[s[i]] < m[s[i+1]]){
            result = result - m[s[i]];
        }else{
            result = result + m[s[i]];
        }
    }
    return result;
}

int main() {
	cout << romanToInt("XIV");
	return 0;
}