#include <bits/stdc++.h>

int main() {
  int N;
  std::cin >> N;
  struct id {
    int v;
    id &operator=(const id &x) {
      v = x.v;
      return *this;
    }
  };
  auto comp = [&](id i, id j) {
    if (i.v == j.v) {
      return false;
    }
    std::cout << "? " << i.v << " " << j.v << "\n";
    int T;
    std::cin >> T;
    return T == 1;
  };

  std::vector<id> c(N);
  for (int i = 0; i < N; i++) {
    c[i].v = i + 1;
  }
  std::stable_sort(c.begin(), c.end(), comp);
  std::cout << "!\n" << N - 1 << "\n";
  for (int i = 0; i < N; i++) {
    std::cout << c[i].v << " \n"[i + 1 == N];
  }
}