roblox OA ancestor names 根据roman to int改的

public class Solution {
    public List<String> sortRoman(List<String> names) {
        List<String> results = new ArrayList<>();
        TreeMap<String, String> sorted_map = new TreeMap<>();

        for (String name : names) {
            String digitsName = name.split(" ")[0] + romanToInt(name.split(" ")[1]);
            sorted_map.put(name, digitsName);
        }

        for (String name : sorted_map.keySet()) {
            results.add(name);
        }

        return results;
    }

    public int romanToInt(String s) {
        char[] sc = new char[s.length()];

        sc = s.toCharArray();
        int ans = toInt(sc[0]);
        for (int i = 1; i < s.length(); i++) {
            ans += toInt(sc[i]);
            if (toInt(sc[i - 1]) < toInt(sc[i])) {
                ans -= 2 * toInt(sc[i - 1]);
            }
        }
        return ans;
    }

    //toInt
    private int toInt (char s) {
        switch(s) {
            case 'I':return 1;
            case 'V':return 5;
            case 'X':return 10;
            case 'L':return 50;
            case 'C':return 100;
            case 'D':return 500;
            case 'M':return 1000;
        }
        return 0;
    }
}