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