input:

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

output:

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

result:

wrong answer Too many queries , n = 4 , now_q 4 (test case 3)