package exercise;
import java.util.Scanner;
public class Sum{
public static void main(String[]args){
Scanner scan=new Scanner(System.in);
System.out.println("请输入数字:");
int number=scan.nextInt();
int sum=0;
for(int i=1;i<=1000;i++){
sum+=number;
}
System.out.println(sum);
}
}