from random import shuffle
N = int(input())
P = list(range(1,N+1))
shuffle(P)
RP = [-1]*N
for i in range(N):
    RP[P[i]-1] = i

def ask(a,b):
    print("?",P[a],P[b])
    T = int(input())
    return T == 1


if ask(0,1):
    now = [0,1]
else:
    now = [1,0]

for i in range(2,N):
    if ask(i,now[0]):
        now.insert(0,i)
    elif ask(now[-1],i):
        now.append(i)
    else:
        for j in range(1,len(now)-1):
            if ask(i,now[j]):
                now.insert(j,i)
                break
        else:
            now.insert(len(now)-1,i)

print("!")
print(len(now)-1)
print(*list(map(lambda x:P[x],now)))