using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("הכנס מספר זהות");

        int idNum = int.Parse(Console.ReadLine());

        int A = idNum/10;

        int B = idNum%10;

        int idfdig = B/10000000;

        int a = B%10000000;

        int b = a/1000000;

        b = 2*b;

        int o = b/10;

        int p = b%10;

        int c = a%1000000;

        int d = c/100000;

        int e = c%100000;

        int f = e/10000;

        f = 2*f;

        int q = f/10;

        int r = f%10;

        int g = e%10000;

        int h = g/1000;

        int i = g%1000;

        int j = i/100;

        j = j*2;

        int s = j/10;

        int x = j%10;

        int k = i%100;

        int l = k/10;

        int m = k%10;

        int n = m*2;

        int y = n/10;

        int z = n%10;

        int idSum = (idfdig+o+p+d+q+r+h+s+x+l+y+z)%10;

        int t = 10-idSum;

        if (t ==A)

            Console.WriteLine("המספר נכון");

        else

            Console.WriteLine("המספר שגוי");

    }

}