# This is Mathness!

**Number Theory**Level 3

You are given \(10\) digits from \(0\) to \(9\).A crazy set is a set whose elements are one or more numbers whose digits are taken from \(0\) to \(9\),each digit used once compulsorily(in the whole set).

[For example ,\( S =\{12,34,56,70,8,9\}\) is crazy set because it consists of all digits

\(0-9\) and in the total set each digit is used once!! Similarly \( S = \{1234567,890\}\) is also a crazy set.]

Find the number of crazy sets whose sum of elements is 100 .