문제

링크

풀이

#include <iostream>
using namespace std;
 
void solve(void) {
  int n; cin >> n;
 
  cout << 2000 << "\n";
  for (int i=0; i<1000; i++) cout << 1 << " ";
  for (int i=0; i<1000; i++) cout << 1000 << " ";
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  solve();
  return 0;
}