import sys

n = int(input())

ans = []
for i in range(1,n+1):
    print("?",n-1)
    l = [j for j in range(1,n+1) if j != i]
    print(*l)
    sys.stdout.flush()
    if int(input()) == 0:
        ans.append(i)

print("!",len(ans))
print(*ans)