class Solution {
    public int lengthOfLastWord(String s) {
        int ind = s.length();
        int left = 0, right = -1;
        while (--ind >= 0) {
            if (s.charAt(ind) != ' ') {
                right = ind;
                break;
            }
        }
        ind = right;
        while (--ind >= 0) {
            if (s.charAt(ind) == ' ') {
                left = ind + 1;
                break;
            }
        }
        return right - left + 1;
    }
}