public class Solution {

    public bool RepeatedSubstringPattern(string s) {

        var len = s.Length;

            if (len < )

            {

                return false;

            }

            else if (len == )

            {

                if (s[] == s[])

                {

                    return true;

                }

                else

                {

                    return false;

                }

            }

            else

            {

                var bound = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(len) / ));

                for (int i = ; i <= bound; i++)

                {

                    if (len % i == )

                    {

                        var teams = len / i;//共teams组,每组i个字符

                        var orginal = s.Substring(, i);//第一组的串

                        var count = ;

                        for (int t = ; t < teams; t++)

                        {

                            var copy = s.Substring(t * i, i);

                            if (orginal == copy)

                            {

                                count++;

                            }

                            else

                            {

                                break;

                            }

                        }

                        if (count == teams - )

                        {

                            return true;

                        }

                    }

                }

                return false;

            }

    }

}