import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		new Main().run();
	}
	
	long pow(long a,long n) {
		long ret=1;
		for(;n>0;n/=2,a=a*a%2)if(n%2==1)ret=ret*a%2;
		return ret;
	}
	
	void run() {
		Scanner sc=new Scanner(System.in);
		//f(0)=a
		//f(+1)=b
		//f(-1)=c
		//f(x)={(b+c-2a)/2}x^2+{(b-c)/2}x+a
		int D=sc.nextInt();
		int[] A=new int[D+1];
		for(int i=0;i<A.length;++i)A[i]=sc.nextInt();
		int a=A[0];
		int b=0,c=0;
		for(int i=0;i<A.length;++i) {
			b+=A[i]*pow(+1,i);
			c+=A[i]*pow(-1,i);
		}
		int[] B=new int[3];
		B[0]=a;B[1]=(b-c)/2;B[2]=(b+c-2*a)/2;
		int deg=2;
		while(deg>=0&&B[deg]==0)--deg;
		System.out.println(Math.max(deg,0));
		for(int i=0;i<=Math.max(deg,0);++i) {
			System.out.print(B[i]+(i==deg?"\n":" "));
		}
	}

	void tr(Object...objects) {System.out.println(Arrays.deepToString(objects));}
}


class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() { return Double.parseDouble(next());}
}