class Compare:
    def __init__(self,v):
        self.val = v
    def __lt__(self, other):
        return query(self.val, other.val)

def query(x,y):
    print(f"? {x} {y}", flush=1)
    return int(input())

n = int(input())
*a, = map(Compare,range(1,n+1)[::-1])
a.sort()

print("!",flush=1)
print(n-1,flush=1)
print(*[x.val for x in a],flush=1)