#### Question: [Problem G]

Should the empty set be considered?

Should the numbers of the same value in the set considered to be inherently different?

#### Judge answer:

The empty set must not be considered. You must compute the number of non-empty subsets Y of X with those properties.

The numbers in the set may have same values, but must be considered different.

So the answer for the following input is 2:

2 1

1 1

0 0