[34 th BCS Preliminary : 2013]
1. 17
2. 11
3. 13
4. 15
1. 4
2. 9
3. 8
4. 5
1. {1, 2, 3}
2. {1, 2, ∅}
3. {2, 3, ∅}
4. {∅}
1. 8
3. 25
4. 16
1.
2.
3.
4.