#include <bits/stdc++.h>
using namespace std;
int main(int argc, char* argv[]) {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long i, t, n, com, midc;
  cin >> n;
  map<int, int> m;
  set<int> s;
  vector<int> x(n);
  vector<int> a(3);
  for (i = 0; i < n; i++) {
    cin >> x[i];
    m[x[i]]++;
    s.insert(x[i]);
  }
  t = s.size();
  if (t == 1) {
    cout << n << endl;
    for (i = 0; i < n; i++) cout << x[i] << " ";
    cout << endl;
  } else if (t == 2) {
    i = 0;
    for (set<int>::const_iterator it = s.begin(); it != s.end(); it++) {
      a[i] = *it;
      i++;
    }
    if (abs(a[0] - a[1]) == 1) {
      cout << n << endl;
      for (i = 0; i < n; i++) cout << x[i] << " ";
      cout << endl;
    } else {
      com = min(m[a[0]], m[a[1]]);
      cout << n - (2 * com) << endl;
      ;
      for (i = 0; i < (2 * com); i++) cout << a[0] + 1 << " ";
      for (i = 0; i < m[a[0]] - com; i++) cout << a[0] << " ";
      for (i = 0; i < m[a[1]] - com; i++) cout << a[1] << " ";
      cout << endl;
    }
  } else {
    i = 0;
    for (set<int>::const_iterator it = s.begin(); it != s.end(); it++) {
      a[i] = *it;
      i++;
    }
    midc = m[a[1]] / 2;
    com = min(m[a[0]], m[a[2]]);
    if (midc > com) {
      cout << n - (midc * 2) << endl;
      for (i = 0; i < midc; i++) {
        cout << a[0] << " ";
        cout << a[2] << " ";
      }
      for (i = 0; i < m[a[0]]; i++) cout << a[0] << " ";
      for (i = 0; i < m[a[2]]; i++) cout << a[2] << " ";
      if (m[a[1]] % 2) cout << a[1];
      cout << endl;
    } else {
      cout << n - (2 * com) << endl;
      for (i = 0; i < m[a[1]]; i++) cout << a[1] << " ";
      for (i = 0; i < (2 * com); i++) cout << a[1] << " ";
      for (i = 0; i < m[a[0]] - com; i++) cout << a[0] << " ";
      for (i = 0; i < m[a[2]] - com; i++) cout << a[2] << " ";
      cout << endl;
    }
  }
  return 0;
}
