#include<bits/stdc++.h>
using namespace std;

int main(){
  vector<int> a={1,3,5,7};
  for (int i=0;i<30;i++) a.push_back(3);
  int n=a.size();
  cout<<n<<endl;
  for (int i=0;i<n;i++) cout<<a[i]<<" \n"[i==n-1];
}