input:

3
5
3
2
5
6
6
5
3
1
4
3
2
1

output:

? 1 5
? 1 3
? 4 5
! 4
? 1 6
? 4 6
? 1 3
? 1 2
! 2
? 1 4
? 1 3
? 1 2
! 3

result:

wrong answer Wrong prediction (test case 3)