华为OD机试E卷-出租车计费(100分) JAVA

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int[] nums = Arrays.stream(in.nextLine().split("")).mapToInt(Integer::parseInt).toArray();
        System.out.println(calculate_price(nums));
    }

    private static int calculate_price(int[] nums) {
        int actual = 0;
        for (int num : nums) {
            actual = actual * 9 + num;
            if (num > 4) {
                actual -= 1;
            }
        }
        return actual;
    }