38. Count and Say

public String countAndSay(int n) {
        String arr[] = new String[n + 1];
        arr[1] = 1 + "";
        for(int i = 2; i <= n ; i++) {
            StringBuffer bgf = new StringBuffer("");
            char temp = arr[i-1].charAt(0);
            int flag = 1 ;
            for(int x = 1 ; x < arr[i-1].length();x++) {
                if(temp != arr[i-1].charAt(x)) {
                    bgf.append(flag);
                    bgf.append(temp);
                    flag =1;
                    temp = arr[i-1].charAt(x);
                }
                else flag++;
            }
            bgf.append(flag);                             //妙点
            bgf.append(temp);
            arr[i] = bgf.toString();
        }
        return arr[n];
    }
}

队列法 也行ok
递归 xxx太难了