cp/codeforces/1016/io/2093d.1.cpin

2
2
5
-> 4 3
<- 15
<- 4
-> 3 1
-> 1 3
1
8
-> 1 1
-> 1 2
-> 2 1
-> 2 2
<- 1
<- 2
<- 3
<- 4