task_roman_to_int

class Solution {
    private int translate(char c){
        switch (c) {
            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;

            default:
                return 0;

    }
}

    public int romanToInt(String s){
        int sum=0;
        int cur = translate(s.charAt(0));
        for (int i=1;i<s.length();i++){
            int next = translate(s.charAt(i));
            if (cur<next){sum-=cur;}
            else {sum+=cur;}
            cur=next;
        }
        sum+=cur;
        return sum;
    }
}