#include <iostream>
using namespace std;

#define D 10000

int d;
int a[D+1];
int b[] = { 0, -1, 0, 1 };

int main()
{
	cin >> d;
	for ( int i = 0; i < d + 1; i++ ) {
		cin >> a[i];
	}

	for ( int i = d; i >= 3; i-- ) {
		int x = a[i];
		a[i] -= b[3] * x; a[i-2] -= b[1] * x;
	}

	int rd;
	for ( rd = d; rd > 0 && a[rd] == 0; rd-- ) {}

	cout << rd;
	for ( int i = 0; i < rd + 1; i++ ) {
		cout << (i == 0 ? "\n" : " ");
		cout << a[i];
	}
	cout << endl;

	return 0;
}