#include <iostream>
#include <math.h>
using namespace std;

void main()
{
    int N, c;
m1:
    cout << "input number: ";

    if (cin >> N;)
    {
        if (N != 0)
        {
            if (N < 0)
                    N = abs(N);

            for (int i = 9; i >= 0; i--)
            {
                    int N1 = N;
                    int f = 0;
                    while (N1 != 0)
                    {
                            int a = N1 % 10;
                            N1 = N1 / 10;
                            if (a == i)
                                    f = 1;
                    }
                    if (f == 0)
                            cout << i << " ";
            }
        }
        else
        {
                cout << endl << "Number must be different from 0" << endl << "Try again" << endl;
                goto m1;
        }
    }
    else
    {
        cout << endl << "Type mismatch" << endl << "Try again" << endl;
        goto m1;
    }

    cout << endl << "One more?" << endl << "0 - No / 1 - Yes: ";
    cin >> c;
    if (c == 1)
            goto m1;
}