import java.util.Scanner;
public class BMICalculator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("请输入身高（米）：");
        double height = scanner.nextDouble();

        System.out.print("请输入体重（千克）：");
        double weight = scanner.nextDouble();

        double bmi = weight / (height * height);
        System.out.printf("你的 BMI 值为：%.2f%n", bmi);

        // BMI 范围判断
        if (bmi < 18.5) {
            System.out.println("体重过轻");
        } else if (bmi < 24) {
            System.out.println("正常范围");
        } else if (bmi < 28) {
            System.out.println("超重");
        } else {
            System.out.println("肥胖");
        }
        scanner.close();
    }
}