如题。是因为我代码有问题，还是说是服务器的问题？
package zh.codegym.task.task04.task0416;
/*
蒙眼过马路
*/
import java.io.*;
import java.util.Scanner;
public class Solution {
public static void main(String[] args) throws Exception {
//在此编写你的代码
boolean b = true;
double num = input();
while (b == true) {
if (num >= 0 && num <= 4) {
if (num >= 0 && num < 3) {
System.out.println("绿灯");
} else {
if (num >= 3 && num < 4) {
System.out.println("黄灯");
}
if (num >= 4 && num < 5) {
System.out.println("红灯");
}
}
b = false;
} else
num -= 5;
}
}
public static Double input() {
Scanner scanner = new Scanner(System.in);
return scanner.nextDouble();
}
}