1.in
7
li 1
ri 2
li 3
ri 4
ri 5
li 6
ri 7
2.in
19
li 1
ri 2
li 3
ri 4
ri 5
li 6
ri 7
rr
rr
rr
rr
rr
rr
rr
rr
rr
rr
rr
rr
3.in
19
li 1
ri 2
li 3
ri 4
ri 5
li 6
ri 7
lr
lr
lr
lr
lr
lr
lr
lr
lr
lr
lr
lr
4.in
16
rr
lr
rr
lr
ri 1
rr
lr
rr
lr
ri 2
rr
lr
rr
lr
ri 3
rr
