Divide The Marks 1

Statement: Consider a multiset S which contains A copies of the marks 1, B copies of 2 and C copies of 3. For example, if A=3, B=3 and C=3, then **S= {1,1,1,2,2,2,3,3,3}.** Your goal is to divide the marks of **S** into two groups (multisets); each mark of the set must be present the sum of marks of one group must be equal to the sum of marks of the other group. In our example, it is p