#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

int main() {
  int n; cin >> n;
  cout << "1 3";
  if (n % 2 == 0) {
    for (int i = 0; i < (n - 2) / 2; i++) {
      cout << " 1 2";
    }
  } else {
    for (int i = 0; i < n - 2; i++) {
      cout << " 3";
    }
  }
  cout << endl;
  return 0;
}