C++ solution

string hackerrankInString(string s) { string s1("hackerrank"); string str("");

for (int i = 0; i < s1.size(); i++)
{
    for (int j = 0; j < s.size(); j++)
    {
        if (s1[i] == s[j])
        {
            str += s[j];
            i++;

            if (str == s1)
                return "YES";
        }
    }
}
return "NO";

}