import java.util.Arrays;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		final int D = sc.nextInt();
		int[] as = new int[D + 1];
		for(int i = 0; i <= D; i++){
			as[i] = sc.nextInt();
		}
		
		int[] bs = {0, -1, 0, 1};
		
		//System.out.println(Arrays.toString(as));
		for(int i = D - (bs.length - 1); i >= 0; i--){
			final int pow = as[i + bs.length - 1] / bs[bs.length - 1];
			
			for(int j = bs.length - 1; j >= 0; j--){
				as[i + j] -= pow * bs[j];
			}
			
			//System.out.println(Arrays.toString(as));
		}
		
		boolean div_ok = true;
		int non_zero = 0;
		for(int i = D; i >= 0; i--){
			if(as[i] != 0){
				non_zero = i;
				div_ok = false;
				break;
			}
		}
		
		if(div_ok){
			System.out.println(0);
			System.out.println(0);
		}else{
			System.out.println(non_zero);
			for(int i = 0; i <= non_zero; i++){
				if(i != 0){
					System.out.print(" ");
				}
				System.out.print(as[i]);
			}
			System.out.println();
		}
		
	}
	
}