Count and Say

class Solution {
public:
    string countAndSay(int n) {
        string s = "1",cs;
        while(--n){
            for(int m = 0,i = 1;m < s.size();m++,i++){
                if(m+1 == s.size() || s[m] != s[m+1]){
                    cs += (i + '0');
                    cs += s[m];
                    i = 0;
                }
            }
            s = cs;
            cs = "";
        }
        return s;
    }
};