public class Sudoku_Field {

    private static boolean isValidSudoku(int[] numbers) {

        if (numbers.length == 0 || numbers.length > 9) return false;
        if (numbers == null) return false;

        int validSum = 0, rowSum = 0;
        int[] summands = {10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000};


        for (int i = 0; i <= 8; i++) {
            validSum += summands[i];
        }

        Out.println(validSum);

        for(int i = 0; i < 9; i++) {
            int help = numbers[i];
            for(int j = 1; j <= help; j++) {
                rowSum = rowSum+(10*10);
            }
        }
        Out.println(rowSum);
        if (validSum != rowSum) return false;
        else return true;
    }

    public static void main (String[] args) {

        int[] sudokuRow = new int[9];
        int count = 1;

        do {
            Out.print("Please input the " + count + ". number: ");
            sudokuRow[(count-1)] = In.readInt();
            count++;
        } while (count <= 9);

        if(isValidSudoku(sudokuRow)) {
            Out.print("Valid Sudoku row!");
        } else {
            Out.print("Invalid Sudoku row!");
        }
    }
}