public class Solution {
    public String countAndSay(int n) {
        if(n <= 0)
            return "";
        if(n == 1)
            return "1";
        String currNum = "1";
        for(int i=2; i<=n; i++) {
            currNum = countAndSay(currNum);
        }
        return currNum;
    }
    public String countAndSay(String num) {
        StringBuilder sb = new StringBuilder();
        for(int i=0; i<num.length(); i++) {
            int count = 1;
            char c = num.charAt(i);
            while(i < num.length() - 1 && num.charAt(i) == num.charAt(i+1)) {
                count++;
                i++;
            }
            sb.append(count);
            sb.append(c);
        }
        return sb.toString();
    }
}
/*
int aint = 1;
char achar = 1;
//you will get "50" in this way because the + is not the string operator
sb.append(aint+achar);
//Correct code
sb.append(aint);
sb.append(achar);
*/