/*
 * @lc app=leetcode id=58 lang=java
 *
 * [58] Length of Last Word
 */

// @lc code=start
class Solution {
    public int lengthOfLastWord(String s) {
        if(s == null || s.isBlank()) {
            return 0;
        }
        int i = s.length() - 1;
        while(i >= 0 && s.charAt(i) == ' ') {
            i--;
        }
        int r = 0;
        while(i >= 0) {
            if(s.charAt(i) != ' ') {
                r++;
                i--;
            } else {
                break;
            }
        }
        return r;
    }
}
// @lc code=end