input:

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

output:

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

result:

wrong answer Integer 2 violates the range [3, 4] (test case 3)