McCockandballs

{
        Scanner input = new Scanner(System.in);
        int n,number,k,one,two;
        System.out.println("Enter a number");
        n = input.nextInt();

        for(int i=0;i<=n;i++) {
            one = two = 0;
            number = i;
            do {
                k = number % 10;
                number /= 10;
                if(k==1) {
                    one++;
                }

                if(k==2) {
                    two++;
                }

            }while(number>0);

            if(one==two+1) {
                System.out.println(i);
            }

        }

    }