import java.util.Random;
import java.util.Scanner;
class RandomGame
{
public static void main(String[] args)
{
Random r=new Random();
int a=r.nextInt(1000);
// System.out.println(a);
Scanner input=new Scanner(System.in);
System.out.print("请输入数字0-1000:");
int b=input.nextInt();
int c=1;