def II() -> int : return int(input())

n = II()
now = [1]

for i in range(2,n+1):
    print("?",now[-1],i)
    if II():
        now = now + [i]
        continue
    print("?",i,now[0])
    if II():
        now = [i] + now
        continue
    
    #二分探索しましょう
    l = 0
    r = len(now)-1
    while r-l > 1:
        mid = l+r//2
        print("?",mid,i)
        
        if II():
            l = mid
        else:
            r = mid
    
    now = now[:r] + [i] + now[r:]

print("!")
print(n-1)
print(*now)