#include <iostream>
using namespace std;

int D;
int a[10010];

int f(int x){
	int res = 0;
	for(int i=0,p=1;i<=D;i++,p*=x)res += a[i] * p;
	return res;
}

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

	int c = f(0);
	int b = (f(1) - f(-1)) / 2;
	int a = f(1) - b - c;
	
	int res[] = {c, b, a};
	int deg = 2;

	while(deg > 0 && res[deg] == 0)--deg;

	cout << deg << endl;
	for(int i=0;i<=deg;i++){
		if(i != 0)cout << " ";
		cout << res[i];
	}

	return 0;
}