===
3



10


3
1
1/2
1/2


1.
2.
3. (2)
4. (3)



10


3
1
1/2
1/2


1.
2.
3. (2)
4. (3)



10

3
1
1/2
1/2


1.
2.
3. (2)
4. (3)



10
3
3
2
3
1
1/2
1/2


1.
2.
3. (2)
4. (3)