/* -*- coding: utf-8 -*-
 *
 * 40.cc: No.40 多項式の割り算 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_D = 10000;
const int E = 3;
const int ds[] = {0, -1, 0, 1};

/* typedef */

/* global variables */

int as[MAX_D + 1];

/* subroutines */

/* main */

int main() {
  int d;
  cin >> d;
  for (int i = 0; i <= d; i++) cin >> as[i];

  for (int i = d; i >= E; i--) {
    int m = as[i] / ds[E];
    for (int j = E; j >= 0; j--) as[i - E + j] -= m * ds[j];
  }

  while (d >= 0 && as[d] == 0) d--;
  if (d < 0) puts("0\n0\n");
  else {
    printf("%d\n", d);
    for (int i = 0; i <= d; i++) printf("%d ", as[i]);
    putchar('\n');
  }

  return 0;
}