38. Count and Say

The count-and-say sequence is the sequence of integers with the first five terms as following:

1.     1
2.     11
3.     21
4.     1211
5.     111221

1 is read off as "one 1" or 11.
11 is read off as "two 1s" or 21.
21 is read off as "one 2, then one 1" or 1211.

Given an integer n, generate the n^th term of the count-and-say sequence.

class Solution {
    public String countAndSay(int n) {
        String res ="1";
        String cur = "1";
        for(int i=1;i<n;i++){
            char temp = cur.charAt(0);
            int count=1;
            res="";
            for(int j=1;j<cur.length();j++){
                if(cur.charAt(j)!=temp){
                    res = res+count + temp;
                    count=1;
                    temp = cur.charAt(j);
                }
                else
                    count++;
            }
            if(cur.charAt(cur.length()-1)==temp)
                res = res+count+temp;
            cur=res;
        }
        return res;
    }
}