洛谷入门题P1422、P1085、P1089、P1909题解（Java语言描述）

P1422题目描述

P1422题目链接

P1422题解

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int num = scanner.nextInt();
        final int LOW_NUM = 150;
        final int HIGH_NUM = 400;
        final double LOW_RATE = 0.4463;
        final double MIDDLE_RATE = 0.4663;
        final double HIGH_RATE = 0.5663;
        double result;
        if (num